post-merge fixups

docsys/src/main/java/io/nosqlbench/docsys/endpoints/DocsysMarkdownEndpoint.java

@@ -180,12 +180,6 @@ public class DocsysMarkdownEndpoint implements WebServiceObject {
     }
 
     private void enable(Set<String> enabled) {
-
-        Set<String> toEnable = new HashSet<>();
-        if (this.enables !=null) {
-            toEnable.addAll(this.enables);
-        }
-
         for (DocsNameSpace nsinfo : docsinfo) {
             // add namespaces which are neither enabled nor disabled to the default group
             if (nsinfo.isEnabledByDefault()) {
@@ -204,6 +198,4 @@ public class DocsysMarkdownEndpoint implements WebServiceObject {
             this.enabled = disabled.remove(enabled);
         }
     }
-
-
 }

driver-cql-shaded/src/main/java/io/nosqlbench/activitytype/cql/datamappers/functions/to_daterange/DateRangeFunc.java

@@ -75,13 +75,12 @@ public class DateRangeFunc implements LongFunction<DateRange> {
         this.upper = upper;
     }
 
-
     @Override
     public DateRange apply(long value) {
         Date lowerDate = new Date(lower.applyAsLong(value));
         DateRange.DateRangeBound lower = DateRange.DateRangeBound.lowerBound(lowerDate,precision);
         Date upperDate = new Date(upper.applyAsLong(value));
-        DateRange.DateRangeBound upper = DateRange.DateRangeBound.upperBound(lowerDate,precision);
+        DateRange.DateRangeBound upper = DateRange.DateRangeBound.upperBound(upperDate,precision);
         DateRange dateRange = new DateRange(lower, upper);
         return dateRange;
     }

driver-cql-shaded/src/main/java/io/nosqlbench/activitytype/cql/statements/core/AvailableCQLStatements.java

@@ -30,8 +30,6 @@ public class AvailableCQLStatements {
     }
 
     public List<CQLStatementDefParser> getMatching(String tagSpec) {
-
-        List<CQLStatementDefParser> defs = new ArrayList<>();
         TagFilter ts = new TagFilter(tagSpec);
         List<CQLStatementDefParser> CQLStatementDefParsers =
                 availableDefs.stream()

driver-cql-shaded/src/main/java/io/nosqlbench/activitytype/cql/statements/core/CQLSessionCache.java

@@ -320,7 +320,7 @@ public class CQLSessionCache implements Shutdownable {
         Cluster cl = builder.build();
 
         // Apply default idempotence, if set
-        activityDef.getParams().getOptionalBoolean("defaultidempotence").map(
+        activityDef.getParams().getOptionalBoolean("defaultidempotence").ifPresent(
             b -> cl.getConfiguration().getQueryOptions().setDefaultIdempotence(b)
         );
 
@@ -358,7 +358,7 @@ public class CQLSessionCache implements Shutdownable {
 
                 try (BufferedInputStream inputStream = new BufferedInputStream(url.openStream());
                      FileOutputStream fileOS = new FileOutputStream(tmp)) {
-                    byte data[] = new byte[1024];
+                    byte[] data = new byte[1024];
                     int byteContent;
                     while ((byteContent = inputStream.read(data, 0, 1024)) != -1) {
                         fileOS.write(data, 0, byteContent);

driver-cql-shaded/src/main/java/io/nosqlbench/activitytype/cql/statements/core/CQLStatementDefParser.java

@@ -12,30 +12,18 @@ public class CQLStatementDefParser {
     private final static Logger logger = LogManager.getLogger(CQLStatementDefParser.class);
     //    private final static Pattern templateToken = Pattern.compile("<<(\\w+(:(.+?))?)>>");
     private final static Pattern stmtToken = Pattern.compile("\\?(\\w+[-_\\d\\w]*)|\\{(\\w+[-_\\d\\w.]*)}");
-    private final static String UNSET_VALUE = "UNSET-VALUE";
     private final String stmt;
     private final String name;
 
-    private CQLStatementDef deprecatedDef; // deprecated, to be removed
-
     public void setBindings(Map<String, String> bindings) {
         this.bindings = bindings;
     }
 
     private Map<String, String> bindings;
 
-    public CQLStatementDef getDeprecatedDef() {
-        return deprecatedDef;
-    }
-
-    public void setDeprecatedDef(CQLStatementDef deprecatedDef) {
-        this.deprecatedDef = deprecatedDef;
-    }
-
     public CQLStatementDefParser(String name, String stmt) {
         this.stmt = stmt;
         this.name = name;
-        this.bindings = bindings;
     }
 
     public Map<String,String> getBindings() {
@@ -64,7 +52,7 @@ public class CQLStatementDefParser {
     public String getParsedStatementOrError(Set<String> namedBindings) {
         ParseResult result = getParseResult(namedBindings);
         if (result.hasError()) {
-            throw new RuntimeException("Statement template has errors:\n" + result.toString());
+            throw new RuntimeException("Statement template has errors:\n" + result);
         }
         return result.getStatement();
     }
@@ -115,13 +103,14 @@ public class CQLStatementDefParser {
         private final Set<String> missingGenerators;
         private final Set<String> missingAnchors;
         private final String statement;
-        private Map<String,String> bindings;
+        private final Map<String,String> bindings;
         private final String name;
 
         public ParseResult(String stmt, String name, Map<String,String> bindings, Set<String> missingGenerators, Set<String> missingAnchors) {
             this.missingGenerators = missingGenerators;
             this.missingAnchors = missingAnchors;
             this.statement = stmt;
+            this.bindings = bindings;
             this.name = name;
         }
 

driver-cql-shaded/src/main/java/io/nosqlbench/activitytype/cql/statements/rowoperators/verification/DiffType.java

@@ -23,7 +23,7 @@ public enum DiffType {
     /// the actual data.
     all(0x1|0x1<<1|0x1<<2);
 
-    public int bitmask;
+    public final int bitmask;
 
     DiffType(int bit) {
         this.bitmask = bit;

driver-cql-shaded/src/test/java/io/nosqlbench/generators/cql/lang/ParserForCqlTest.java

@@ -9,6 +9,7 @@ import java.nio.file.*;
 import java.util.ArrayList;
 import java.util.Enumeration;
 import java.util.List;
+import java.util.stream.Stream;
 
 public class ParserForCqlTest {
 
@@ -37,15 +38,14 @@ public class ParserForCqlTest {
                 URL url = resources.nextElement();
                 System.out.println("url=" + url.toExternalForm());
                 Path path = Paths.get(url.toURI());
-                Files.walk(path, FileVisitOption.FOLLOW_LINKS)
+                try (Stream<Path> fileStream = Files.walk(path, FileVisitOption.FOLLOW_LINKS)) {
-                    .filter(p -> !Files.isDirectory(p, LinkOption.NOFOLLOW_LINKS))
+                    fileStream.filter(p -> !Files.isDirectory(p, LinkOption.NOFOLLOW_LINKS))
                             .forEach(subpaths::add);
                 }
+            }
         } catch (Exception e) {
             throw new RuntimeException(e);
         }
         return subpaths;
-
     }
-
 }

driver-cqld3-shaded/src/main/java/io/nosqlbench/activitytype/cql/statements/core/AvailableCQLStatements.java

@@ -30,8 +30,6 @@ public class AvailableCQLStatements {
     }
 
     public List<CQLStatementDefParser> getMatching(String tagSpec) {
-
-        List<CQLStatementDefParser> defs = new ArrayList<>();
         TagFilter ts = new TagFilter(tagSpec);
         List<CQLStatementDefParser> CQLStatementDefParsers =
                 availableDefs.stream()

driver-cqld3-shaded/src/main/java/io/nosqlbench/activitytype/cql/statements/core/CQLSessionCache.java

@@ -304,7 +304,7 @@ public class CQLSessionCache implements Shutdownable {
         Cluster cl = builder.build();
 
         // Apply default idempotence, if set
-        activityDef.getParams().getOptionalBoolean("defaultidempotence").map(
+        activityDef.getParams().getOptionalBoolean("defaultidempotence").ifPresent(
             b -> cl.getConfiguration().getQueryOptions().setDefaultIdempotence(b)
         );
 

driver-cqld3-shaded/src/main/java/io/nosqlbench/activitytype/cql/statements/core/CQLStatementDefParser.java

@@ -12,30 +12,18 @@ public class CQLStatementDefParser {
     private final static Logger logger = LogManager.getLogger(CQLStatementDefParser.class);
     //    private final static Pattern templateToken = Pattern.compile("<<(\\w+(:(.+?))?)>>");
     private final static Pattern stmtToken = Pattern.compile("\\?(\\w+[-_\\d\\w]*)|\\{(\\w+[-_\\d\\w.]*)}");
-    private final static String UNSET_VALUE = "UNSET-VALUE";
     private final String stmt;
     private final String name;
 
-    private CQLStatementDef deprecatedDef; // deprecated, to be removed
-
     public void setBindings(Map<String, String> bindings) {
         this.bindings = bindings;
     }
 
     private Map<String, String> bindings;
 
-    public CQLStatementDef getDeprecatedDef() {
-        return deprecatedDef;
-    }
-
-    public void setDeprecatedDef(CQLStatementDef deprecatedDef) {
-        this.deprecatedDef = deprecatedDef;
-    }
-
     public CQLStatementDefParser(String name, String stmt) {
         this.stmt = stmt;
         this.name = name;
-        this.bindings = bindings;
     }
 
     public Map<String,String> getBindings() {
@@ -64,7 +52,7 @@ public class CQLStatementDefParser {
     public String getParsedStatementOrError(Set<String> namedBindings) {
         ParseResult result = getParseResult(namedBindings);
         if (result.hasError()) {
-            throw new RuntimeException("Statement template has errors:\n" + result.toString());
+            throw new RuntimeException("Statement template has errors:\n" + result);
         }
         return result.getStatement();
     }

driver-cqld3-shaded/src/main/java/io/nosqlbench/activitytype/cql/statements/rowoperators/verification/DiffType.java

@@ -23,7 +23,7 @@ public enum DiffType {
     /// the actual data.
     all(0x1|0x1<<1|0x1<<2);
 
-    public int bitmask;
+    public final int bitmask;
 
     DiffType(int bit) {
         this.bitmask = bit;

driver-cqld3-shaded/src/test/java/io/nosqlbench/generators/cql/lang/ParserForCqlTest.java

@@ -9,6 +9,7 @@ import java.nio.file.*;
 import java.util.ArrayList;
 import java.util.Enumeration;
 import java.util.List;
+import java.util.stream.Stream;
 
 public class ParserForCqlTest {
 
@@ -37,15 +38,14 @@ public class ParserForCqlTest {
                 URL url = resources.nextElement();
                 System.out.println("url=" + url.toExternalForm());
                 Path path = Paths.get(url.toURI());
-                Files.walk(path, FileVisitOption.FOLLOW_LINKS)
+                try (Stream<Path> fileStream = Files.walk(path, FileVisitOption.FOLLOW_LINKS)) {
-                    .filter(p -> !Files.isDirectory(p, LinkOption.NOFOLLOW_LINKS))
+                    fileStream.filter(p -> !Files.isDirectory(p, LinkOption.NOFOLLOW_LINKS))
                             .forEach(subpaths::add);
                 }
+            }
         } catch (Exception e) {
             throw new RuntimeException(e);
         }
         return subpaths;
-
     }
-
 }

driver-cqlverify/src/main/java/io/nosqlbench/activitytype/cqlverify/CqlVerifyActivity.java

@@ -3,6 +3,7 @@ package io.nosqlbench.activitytype.cqlverify;
 import io.nosqlbench.activitytype.cql.core.CqlActivity;
 import io.nosqlbench.activitytype.cql.statements.rsoperators.AssertSingleRowResultSet;
 import io.nosqlbench.engine.api.activityimpl.ActivityDef;
+import io.nosqlbench.engine.api.activityimpl.ParameterMap;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
@@ -22,27 +23,26 @@ public class CqlVerifyActivity extends CqlActivity {
     @Override
     public synchronized void initActivity() {
 
-        if (!super.getActivityDef().getParams().contains("verify") &&
+        ParameterMap activityParams = super.getActivityDef().getParams();
-            !super.getActivityDef().getParams().contains("verify-fields")) {
+        if (!activityParams.containsKey("verify") &&
+            !activityParams.containsKey("verify-fields")) {
             logger.info("Pre-configuring activity param 'verify=*' since none was provided.");
             logger.info("To control this on a per-statement basis, use the verify param.");
-            super.getActivityDef().getParams().put("verify", "*");
+            activityParams.put("verify", "*");
         }
 
-        if (!super.getActivityDef().getParams().contains("compare")) {
+        if (!activityParams.containsKey("compare")) {
-            super.getActivityDef().getParams().put("compare", "all");
+            activityParams.put("compare", "all");
             logger.info("Pre-configuring activity param 'compare=all' since none was provided.");
             logger.info("To control this on a per-statement basis, use the compare param.");
         }
 
         super.initActivity();
-
     }
 
     @Override
     public void onActivityDefUpdate(ActivityDef activityDef) {
         super.onActivityDefUpdate(activityDef);
         addResultSetCycleOperator(new AssertSingleRowResultSet());
-
     }
 }

driver-dsegraph-shaded/src/main/java/com/datastax/ebdrivers/dsegraph/GraphActivity.java

@@ -209,10 +209,10 @@ public class GraphActivity extends SimpleActivity implements ActivityDefObserver
         try {
             cluster = builder.build();
         } catch (Exception e) {
-            logger.error("Error while instantiating cluster from builder: " + e.toString(), e);
+            logger.error("Error while instantiating cluster from builder: " + e, e);
             throw e;
         }
-        activityDef.getParams().getOptionalBoolean("defaultidempotence").map(
+        activityDef.getParams().getOptionalBoolean("defaultidempotence").ifPresent(
                 b -> cluster.getConfiguration().getQueryOptions().setDefaultIdempotence(b)
         );
 
@@ -236,7 +236,7 @@ public class GraphActivity extends SimpleActivity implements ActivityDefObserver
             logger.info("cluster-metadata-allhosts:\n" + session.getCluster().getMetadata().getAllHosts());
             return session;
         } catch (Exception e) {
-            logger.error("Error while creating a session for dsegraph: " + e.toString(), e);
+            logger.error("Error while creating a session for dsegraph: " + e, e);
             throw e;
         }
 

driver-http/src/main/java/io/nosqlbench/activitytype/http/HttpConsoleFormats.java

@@ -108,7 +108,6 @@ public class HttpConsoleFormats {
         }
 
         long mod = 1L;
-        Set<String> incl = new HashSet<>();
         long mask = 0L;
 
         for (String include : filterSet) {

driver-pulsar/src/main/java/io/nosqlbench/driver/pulsar/PulsarActivity.java

@@ -197,6 +197,6 @@ public class PulsarActivity extends SimpleActivity implements ActivityDefObserve
     }
 
     public void asyncOperationFailed(Throwable ex) {
-        this.asyncOperationFailure = asyncOperationFailure;
+        this.asyncOperationFailure = ex;
     }
 }

engine-api/src/main/java/io/nosqlbench/engine/api/activityapi/core/RunState.java

@@ -33,7 +33,7 @@ public enum RunState {
     // The thread has stopped. This should only be set by the controlled thread
     Stopped("_\u23F9");
 
-    private String runcode;
+    private final String runcode;
 
     RunState(String runcode) {
         this.runcode = runcode;

engine-api/src/main/java/io/nosqlbench/engine/api/activityapi/cyclelog/buffers/results_rle/CycleResultsRLEBufferReadable.java

@@ -83,7 +83,7 @@ public class CycleResultsRLEBufferReadable implements CycleResultSegmentsReadabl
 
     private class ResultSpanIterator implements Iterator<CycleResultsSegment> {
         private final ByteBuffer iterbuf;
-        private Predicate<ResultReadable> filter;
+        private final Predicate<ResultReadable> filter;
         private CycleResultsSegment next;
 
         public ResultSpanIterator(ByteBuffer buf, Predicate<ResultReadable> filter) {
@@ -104,11 +104,8 @@ public class CycleResultsRLEBufferReadable implements CycleResultSegmentsReadabl
 
         @Override
         public CycleResultsSegment next() {
-            if (next==null) {
+            if (next == null && !hasNext()) {
-                hasNext();
+                throw new RuntimeException("Call to next() but there was no remaining unfiltered data.");
-                if (next==null) {
-                    throw new RuntimeException("Possible call to next() without calling hasNext(). There was no remaining unfiltered data.");
-                }
             }
             CycleResultsSegment wasNext = this.next;
             next=null;

engine-api/src/main/java/io/nosqlbench/engine/api/activityapi/planning/IntervalSequencer.java

@@ -67,9 +67,6 @@ import java.util.function.ToLongFunction;
  */
 public class IntervalSequencer<T> implements ElementSequencer<T> {
 
-    private List<T> elems;
-    private ToLongFunction<T> ratioFunc;
-
     @Override
     public int[] seqIndexByRatioFunc(List<T> elements, ToLongFunction<T> ratioFunc) {
 
@@ -101,9 +98,9 @@ public class IntervalSequencer<T> implements ElementSequencer<T> {
 
     private final static class OpSlot<T> {
 
-        private T elem;
+        private final T elem;
-        private double position;
+        private final double position;
-        private int rank;
+        private final int rank;
 
         public OpSlot(T elem, double position, int rank) {
             this.elem = elem;

engine-api/src/main/java/io/nosqlbench/engine/api/activityapi/planning/SequencePlanner.java

@@ -27,7 +27,7 @@ import java.util.function.ToLongFunction;
 public class SequencePlanner<T> {
     private final static Logger logger = LogManager.getLogger(SequencePlanner.class);
     private final SequencerType sequencerType;
-    private List<T> elements = new ArrayList<>();
+    private final List<T> elements = new ArrayList<>();
     private final List<Long> ratios = new ArrayList<>();
     private int[] elementIndex;
 
@@ -59,7 +59,6 @@ public class SequencePlanner<T> {
                 logger.trace("sequencing elements by concatenation");
                 this.elementIndex = new ConcatSequencer<T>().seqIndexesByRatios(elements, ratios);
         }
-        this.elements = elements;
         return new Sequence<>(sequencerType, elements, elementIndex);
     }
 

engine-api/src/main/java/io/nosqlbench/engine/api/activityapi/ratelimits/RateSpec.java

@@ -178,8 +178,6 @@ public class RateSpec {
     }
 
     public String toString() {
-        StringBuilder sb = new StringBuilder();
-
         double ratePortion = Math.abs(opsPerSec - ((long) opsPerSec));
         String ratefmt = (ratePortion > 0.001D) ? String.format("%,.3f", opsPerSec) : String.format("%,d", (long) opsPerSec);
 

engine-api/src/main/java/io/nosqlbench/engine/api/activityconfig/ParsedStmt.java

@@ -56,7 +56,7 @@ public class ParsedStmt {
 
     public ParsedStmt orError() {
         if (hasError()) {
-            throw new RuntimeException("Unable to parse statement: " + this.toString());
+            throw new RuntimeException("Unable to parse statement: " + this);
         }
         return this;
     }
@@ -149,14 +149,6 @@ public class ParsedStmt {
         return opDef.getBindings();
     }
 
-    /**
-     * @return the params from the enclosed {@link OpDef}
-     * @deprecated You should use {@link #getParamReader()} instead.
-     */
-    public Map<String, Object> getParams() {
-        return opDef.getParams();
-    }
-
     /**
      * @return a params reader from the enclosed {@link OpDef} params map
      */

engine-api/src/main/java/io/nosqlbench/engine/api/activityconfig/yaml/StmtsBlock.java

@@ -27,8 +27,6 @@ import java.util.*;
 
 public class StmtsBlock implements Tagged, Iterable<OpTemplate> {
 
-    private final static String NameToken = "name";
-    private final static String StmtToken = "stmt";
     private final RawStmtsBlock rawStmtsBlock;
     private final StmtsDoc rawStmtsDoc;
     private final int blockIdx;

engine-api/src/main/java/io/nosqlbench/engine/api/activityimpl/ParameterMap.java

@@ -198,7 +198,7 @@ public class ParameterMap extends ConcurrentHashMap<String,Object> implements Bi
 
     @Override
     public void clear() {
-        logger.debug("parameter map cleared:" + toString());
+        logger.debug("parameter map cleared:" + this);
         super.clear();
 
         markMutation();
@@ -206,7 +206,7 @@ public class ParameterMap extends ConcurrentHashMap<String,Object> implements Bi
 
     @Override
     public Set<Entry<String, Object>> entrySet() {
-        logger.debug("getting entry set for " + toString());
+        logger.debug("getting entry set for " + this);
         return super.entrySet()
                 .stream()
                 .map(e -> new AbstractMap.SimpleEntry<String,Object>(e.getKey(), e.getValue()) {})
@@ -377,7 +377,6 @@ public class ParameterMap extends ConcurrentHashMap<String,Object> implements Bi
     }
 
     public static String toJSON(Map<?,?> map) {
-        StringBuilder sb = new StringBuilder();
         List<String> l = new ArrayList<>();
         map.forEach((k,v) -> l.add("'" + k + "': '" + v + "'"));
         return "params={"+String.join(",\n  ",l)+"};\n";

engine-api/src/main/java/io/nosqlbench/engine/api/activityimpl/SimpleActivity.java

@@ -255,7 +255,7 @@ public class SimpleActivity implements Activity, ProgressCapable {
 
     @Override
     public void setPhaseLimiter(RateLimiter rateLimiter) {
-        this.phaseLimiter = phaseLimiter;
+        this.phaseLimiter = rateLimiter;
     }
 
     @Override

engine-api/src/main/java/io/nosqlbench/engine/api/metrics/HistoStatsCSVWriter.java

@@ -41,7 +41,6 @@ public class HistoStatsCSVWriter {
 
     private PrintStream initFile(File logfile) {
         try {
-            FileOutputStream fileOutputStream = new FileOutputStream(logfile);
             PrintStream writer = new PrintStream(logfile);
             return writer;
         } catch (IOException e) {
@@ -66,7 +65,7 @@ public class HistoStatsCSVWriter {
                 Locale.US,
                 "#[StartTime: %.3f (seconds since epoch), %s]\n",
                 startTime / 1000.0,
-                new Date(startTime).toString()
+                new Date(startTime)
         );
         writer.flush();
     }
@@ -104,7 +103,7 @@ public class HistoStatsCSVWriter {
         csvLine.append(",").append(h.getValueAtPercentile(0.999D));
         csvLine.append(",").append(h.getValueAtPercentile(0.9999D));
         csvLine.append(",").append(h.getMaxValue());
-        writer.println(csvLine.toString());
+        writer.println(csvLine);
 
     }
 }

engine-api/src/main/java/io/nosqlbench/engine/api/metrics/HistoStatsLogger.java

@@ -84,9 +84,7 @@ public class HistoStatsLogger extends CapabilityHook<HdrDeltaHistogramAttachment
     }
 
     public String toString() {
-        StringBuilder sb = new StringBuilder();
+        return "HistoLogger:" + this.pattern + ":" + this.logfile.getPath() + ":" + this.intervalLength;
-        sb.append("HistoLogger:" + this.pattern + ":" + this.logfile.getPath() + ":" + this.intervalLength);
-        return sb.toString();
     }
 
     public long getInterval() {

engine-api/src/main/java/io/nosqlbench/engine/api/metrics/NicerTimer.java

@@ -26,9 +26,8 @@ import java.util.concurrent.TimeUnit;
 
 public class NicerTimer extends Timer implements DeltaSnapshotter, HdrDeltaHistogramAttachment, TimerAttachment {
     private final String metricName;
-    private DeltaHdrHistogramReservoir deltaHdrHistogramReservoir;
+    private final DeltaHdrHistogramReservoir deltaHdrHistogramReservoir;
     private long cacheExpiry = 0L;
-    private ConvenientSnapshot lastSnapshot;
     private List<Timer> mirrors;
 
     public NicerTimer(String metricName, DeltaHdrHistogramReservoir deltaHdrHistogramReservoir) {

engine-api/src/main/java/io/nosqlbench/engine/api/util/Unit.java

@@ -239,13 +239,13 @@ public class Unit {
 
         public static Count valueOfSuffix(String suffix) {
             for (Count count : Count.values()) {
-                if (count.toString().toLowerCase().equals(suffix.toLowerCase())) {
+                if (count.toString().equalsIgnoreCase(suffix)) {
                     return count;
                 }
-                if (count.label.toLowerCase().equals(suffix.toLowerCase())) {
+                if (count.label.equalsIgnoreCase(suffix)) {
                     return count;
                 }
-                if (count.name.toLowerCase().equals(suffix.toLowerCase())) {
+                if (count.name.equalsIgnoreCase(suffix)) {
                     return count;
                 }
             }
@@ -265,17 +265,13 @@ public class Unit {
         TB("TB", "terabyte", bytesPerGB * 1000),
         PB("PB", "petabyte", bytesPerGB * 1000000),
         EB("EB", "exabyte", bytesPerGB * bytesPerGB),
-        ZB("ZB", "zettabyte", bytesPerGB * bytesPerGB * 1000),
-        YB("YB", "yottabyte", bytesPerGB * bytesPerGB * 1000000),
 
         KIB("KiB", "kibibyte", 1024),
         MIB("MiB", "mebibyte", 1024 * 1024),
         GIB("GiB", "gibibyte", BytesPerGiB),
         TIB("TiB", "tebibyte", BytesPerGiB * 1024),
         PIB("PIB", "pebibyte", BytesPerGiB * 1024 * 1024),
-        EIB("EiB", "exbibyte", BytesPerGiB * BytesPerGiB),
+        EIB("EiB", "exbibyte", BytesPerGiB * BytesPerGiB);
-        ZIB("ZiB", "zebibyte", BytesPerGiB * BytesPerGiB * 1024),
-        YIB("YiB", "yobibyte", BytesPerGiB * BytesPerGiB * 1024 * 1024);
 
         private final String name;
         private final long bytes;
@@ -289,16 +285,16 @@ public class Unit {
 
         public static Bytes valueOfSuffix(String unitpart) {
             for (Bytes byteUnit : Bytes.values()) {
-                if (byteUnit.label.toLowerCase().equals(unitpart.toLowerCase())) {
+                if (byteUnit.label.equalsIgnoreCase(unitpart)) {
                     return byteUnit;
                 }
-                if (byteUnit.name.toLowerCase().equals(unitpart.toLowerCase())) {
+                if (byteUnit.name.equalsIgnoreCase(unitpart)) {
                     return byteUnit;
                 }
                 if ((byteUnit.name.toLowerCase() + "s").equals(unitpart.toLowerCase())) {
                     return byteUnit;
                 }
-                if (byteUnit.toString().toLowerCase().equals(unitpart.toLowerCase())) {
+                if (byteUnit.toString().equalsIgnoreCase(unitpart)) {
                     return byteUnit;
                 }
             }
@@ -334,13 +330,13 @@ public class Unit {
 
         public static Duration valueOfSuffix(String spec) {
             for (Duration duration : Duration.values()) {
-                if (duration.label.toLowerCase().equals(spec.toLowerCase())) {
+                if (duration.label.equalsIgnoreCase(spec)) {
                     return duration;
                 }
-                if (duration.toString().toLowerCase().equals(spec.toLowerCase())) {
+                if (duration.toString().equalsIgnoreCase(spec)) {
                     return duration;
                 }
-                if (duration.name.toLowerCase().equals(spec.toLowerCase())) {
+                if (duration.name.equalsIgnoreCase(spec)) {
                     return duration;
                 }
             }

engine-api/src/test/java/io/nosqlbench/engine/api/activityapi/ratelimits/RateSpecTest.java

@@ -44,6 +44,6 @@ public class RateSpecTest {
         RateSpec d = new RateSpec("12345,1.4,restart");
         assertThat(d.verb).isEqualTo(RateSpec.Verb.restart);
         RateSpec c = new RateSpec("12345,1.1");
-        assertThat(c.verb== RateSpec.Verb.start);
+        assertThat(c.verb).isEqualTo(RateSpec.Verb.start);
     }
 }

engine-api/src/test/java/io/nosqlbench/engine/api/activityconfig/yaml/ParsedStmtTest.java

@@ -63,7 +63,7 @@ public class ParsedStmtTest {
 
         OpTemplate stmtDef1 = block2.getOps().get(1);
         ParsedStmt parsed1 = stmtDef1.getParsed();
-        assertThat(parsed1.getMissingBindings().isEmpty());
+        assertThat(parsed1.getMissingBindings()).isEmpty();
         assertThat(parsed1.hasError()).isFalse();
     }
 

engine-api/src/test/java/io/nosqlbench/engine/api/metrics/HistoIntervalLoggerTest.java

@@ -47,20 +47,12 @@ public class HistoIntervalLoggerTest {
 
         hil.onHistogramAdded("histo1",nicerHistogram);
 
-        List<Long> moments = new ArrayList<>(100);
-        moments.add(System.currentTimeMillis()); // 0
         nicerHistogram.update(1L);
-        moments.add(System.currentTimeMillis()); // 1
         delay(1001);
-        moments.add(System.currentTimeMillis()); // 2
         nicerHistogram.update(1000000L);
-        moments.add(System.currentTimeMillis()); // 3
         delay(1001);
-        moments.add(System.currentTimeMillis()); // 4
         nicerHistogram.update(1000L);
-        moments.add(System.currentTimeMillis()); // 5
         hil.onHistogramRemoved("histo1");
-        moments.add(System.currentTimeMillis()); // 6
 
         hil.closeMetrics();
 
@@ -73,7 +65,7 @@ public class HistoIntervalLoggerTest {
                 break;
             }
             histos.add(histogram);
-        };
+        }
 
         assertThat(histos.size()).isEqualTo(2);
         assertThat(histos.get(0)).isInstanceOf(Histogram.class);
@@ -87,7 +79,7 @@ public class HistoIntervalLoggerTest {
             try {
                 Thread.sleep(target-System.currentTimeMillis());
             } catch (InterruptedException ignored) {
-            } ;
+            }
         }
         System.out.println("delayed " + (System.currentTimeMillis() - now) + " millis");
     }

engine-api/src/test/java/io/nosqlbench/engine/api/util/TagFilterTest.java

@@ -45,11 +45,9 @@ public class TagFilterTest {
 
     @Test
     public void testSomeFilterTagsNoItemTagsDoesNotMatch() {
-        Map<String, String> itemtags = new HashMap<>() {{
+        Map<String, String> itemtags = new HashMap<>();
-        }};
         TagFilter tf = new TagFilter("tag=foo");
         assertThat(tf.matches(itemtags).matched()).isFalse();
-
     }
 
     @Test
@@ -59,7 +57,6 @@ public class TagFilterTest {
         }};
         TagFilter tf = new TagFilter("");
         assertThat(tf.matches(itemtags).matched()).isTrue();
-
     }
 
     @Test
@@ -77,7 +74,6 @@ public class TagFilterTest {
         assertThat(tf.matches(itemtags2).matched()).isTrue();
     }
 
-
     @Test
     public void testMatchingKeyMismatchingValueDoesNotMatch() {
         Map<String, String> itemtags = new HashMap<>() {{
@@ -169,5 +165,4 @@ public class TagFilterTest {
         TagFilter tf2 = new TagFilter("any(car:truck,phase:moon)");
         assertThat(tf2.matches(itemtags).matched()).isFalse();
     }
-
 }

engine-cli/src/test/java/io/nosqlbench/engine/cli/TestNBCLIOptions.java

@@ -177,27 +177,28 @@ public class TestNBCLIOptions {
     @Test
     public void listWorkloads() {
         NBCLIOptions opts = new NBCLIOptions(new String[]{ "--list-workloads"});
-        List<Cmd> cmds = opts.getCommands();
+        assertThat(opts.wantsWorkloadsList()).isTrue();
-        assertThat(opts.wantsScenariosList());
+    }
+
+    @Test
+    public void listScenarios() {
+        NBCLIOptions opts = new NBCLIOptions(new String[]{ "--list-scenarios"});
+        assertThat(opts.wantsScenariosList()).isTrue();
     }
 
     @Test
     public void listScripts() {
         NBCLIOptions opts = new NBCLIOptions(new String[]{ "--list-scripts"});
-        List<Cmd> cmds = opts.getCommands();
+        assertThat(opts.wantsScriptList()).isTrue();
-        assertThat(opts.wantsScriptList());
     }
 
-
     @Test
     public void clTest() {
         String dir= "./";
         URL resource = getClass().getClassLoader().getResource(dir);
-        assertThat(resource);
+        assertThat(resource).isNotNull();
         Path basePath = NBIO.getFirstLocalPath(dir);
         List<Path> yamlPathList = PathWalker.findAll(basePath).stream().filter(f -> f.toString().endsWith(".yaml")).collect(Collectors.toList());
-        assertThat(yamlPathList);
+        assertThat(yamlPathList).isNotEmpty();
     }
-
-
 }

engine-core/src/main/java/io/nosqlbench/engine/core/lifecycle/ActivityExecutor.java

@@ -98,7 +98,6 @@ public class ActivityExecutor implements ActivityController, ParameterMap.Listen
      */
     public synchronized void startActivity() {
         logger.info("starting activity " + activity.getAlias() + " for cycles " + activity.getCycleSummary());
-        this.annotatedCommand = annotatedCommand;
         Annotators.recordAnnotation(Annotation.newBuilder()
                 .session(sessionId)
                 .now()
@@ -248,7 +247,6 @@ public class ActivityExecutor implements ActivityController, ParameterMap.Listen
         return wasStopped;
     }
 
-
     /**
      * Listens for changes to parameter maps, maps them to the activity instance, and notifies all eligible listeners of
      * changes.
@@ -256,9 +254,7 @@ public class ActivityExecutor implements ActivityController, ParameterMap.Listen
     @Override
     public synchronized void handleParameterMapUpdate(ParameterMap parameterMap) {
 
-        if (activity instanceof ActivityDefObserver) {
         activity.onActivityDefUpdate(activityDef);
-        }
 
         // An activity must be initialized before the motors and other components are
         // considered ready to handle parameter map changes. This is signaled in an activity

engine-core/src/main/java/io/nosqlbench/engine/core/lifecycle/ScenarioController.java

@@ -383,9 +383,8 @@ public class ScenarioController {
      * @param waitTimeMillis The time to wait, usually set very high
      * @return true, if all activities completed before the timer expired, false otherwise
      */
-    public boolean awaitCompletion(int waitTimeMillis) {
+    public boolean awaitCompletion(long waitTimeMillis) {
         boolean completed = true;
-        long waitstart = System.currentTimeMillis();
         long remaining = waitTimeMillis;
 
         List<ActivityFinisher> finishers = new ArrayList<>();
@@ -410,7 +409,6 @@ public class ScenarioController {
         }
 
         return completed;
-
     }
 
     private ActivityDef aliasToDef(String alias) {

engine-core/src/main/java/io/nosqlbench/engine/core/script/Scenario.java

@@ -311,7 +311,7 @@ public class Scenario implements Callable<ScenarioResult> {
                 endedAtMillis = System.currentTimeMillis();
             }
         }
-        int awaitCompletionTime = 86400 * 365 * 1000;
+        long awaitCompletionTime = 86400 * 365 * 1000L;
         logger.debug("Awaiting completion of scenario for " + awaitCompletionTime + " millis.");
         scenarioController.awaitCompletion(awaitCompletionTime);
         //TODO: Ensure control flow covers controller shutdown in event of internal error.

engine-core/src/main/java/io/nosqlbench/engine/core/script/ScenariosExecutor.java

@@ -113,7 +113,7 @@ public class ScenariosExecutor {
         }
         Map<Scenario, ScenarioResult> scenarioResultMap = new LinkedHashMap<>();
         getAsyncResultStatus()
-                .entrySet().forEach(es -> scenarioResultMap.put(es.getKey(), es.getValue().orElseGet(null)));
+                .entrySet().forEach(es -> scenarioResultMap.put(es.getKey(), es.getValue().orElse(null)));
         return new ScenariosResults(this, scenarioResultMap);
     }
 

engine-docker/src/main/java/io/nosqlbench/engine/docker/DockerHelper.java

@@ -85,13 +85,11 @@ public class DockerHelper {
             portBindings.add(pb);
         }
 
-        List<Volume> volumeList = new ArrayList<>();
         List<Bind> volumeBindList = new ArrayList<>();
         for (String volumeDesc : volumeDescList) {
             String volFrom = volumeDesc.split(":")[0];
             String volTo = volumeDesc.split(":")[1];
             Volume vol = new Volume(volTo);
-            volumeList.add(vol);
             volumeBindList.add(new Bind(volFrom, vol));
         }
 
@@ -121,7 +119,6 @@ public class DockerHelper {
         }
 
         return containerResponse.getId();
-
     }
 
     private boolean startStoppedContainer(String name) {

engine-rest/src/main/java/io/nosqlbench/engine/rest/services/WorkSpace.java

@@ -123,8 +123,7 @@ public class WorkSpace {
 
         List<WorkspaceItemView> items = new ArrayList<>();
 
-        try {
+        try (DirectoryStream<Path> elementPaths = Files.newDirectoryStream(target)) {
-            DirectoryStream<Path> elementPaths = Files.newDirectoryStream(target);
             for (Path elementPath : elementPaths) {
                 items.add(new WorkspaceItemView(this.workspacePath,elementPath));
             }

engine-rest/src/main/java/io/nosqlbench/engine/rest/services/WorkspaceFinder.java

@@ -56,16 +56,13 @@ public class WorkspaceFinder {
 
     public List<WorkspaceView> getWorkspaceViews() {
         List<WorkspaceView> views = new ArrayList<>();
-        DirectoryStream<Path> wsrEntries = null;
+        try (DirectoryStream<Path> wsrEntries = Files.newDirectoryStream(root)) {
-        try {
-            wsrEntries = Files.newDirectoryStream(root);
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-
             for (Path entry : wsrEntries) {
                 views.add(new WorkspaceView(entry));
             }
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
         return views;
     }
 
@@ -137,7 +134,7 @@ public class WorkspaceFinder {
 
             Path relativize = root.relativize(path);
             if (relativize.toString().contains("..")) {
-                throw new RuntimeException("Illegal path to delete: " + path.toString());
+                throw new RuntimeException("Illegal path to delete: " + path);
             }
 
             try (Stream<Path> walk = Files.walk(path)) {
@@ -145,9 +142,9 @@ public class WorkspaceFinder {
                     .map(Path::toFile)
 //                    .peek(System.out::println)
                     .forEach(f -> {
-                        logger.debug("deleting '" + f.toString() + "'");
+                        logger.debug("deleting '" + f + "'");
                         if (!f.delete()) {
-                            throw new RuntimeException("Unable to delete " + f.toString());
+                            throw new RuntimeException("Unable to delete " + f);
                         }
                     });
 

engine-rest/src/main/java/io/nosqlbench/engine/rest/transfertypes/WorkspacesView.java

@@ -16,9 +16,7 @@ public class WorkspacesView {
 
     public List<String> getWorkspaces() {
         List<String> workspaces = new ArrayList<>();
-
+        try (DirectoryStream<Path> paths = Files.newDirectoryStream(workspacesRoot)) {
-        try {
-            DirectoryStream<Path> paths = Files.newDirectoryStream(workspacesRoot);
             for (Path path : paths) {
                 workspaces.add(path.toString());
             }

nb-annotations/src/main/java/io/nosqlbench/nb/annotations/ServiceProcessor.java

@@ -32,14 +32,14 @@ public class ServiceProcessor extends AbstractProcessor {
         return supportedAnnotations;
     }
 
-    private static Pattern packageNamePattern = Pattern.compile("(?<packageName>.+)?\\.(?<className>.+)");
+    private static final Pattern packageNamePattern = Pattern.compile("(?<packageName>.+)?\\.(?<className>.+)");
     private Filer filer;
     private Map<String, String> options;
     private Elements elementUtils;
     private Messager messenger;
     private SourceVersion sourceVersion;
     private Types typeUtils;
-    private Map<String, Writer> writers = new HashMap<>();
+    private final Map<String, Writer> writers = new HashMap<>();
 
     @Override
     public synchronized void init(ProcessingEnvironment processingEnv) {
@@ -68,8 +68,6 @@ public class ServiceProcessor extends AbstractProcessor {
     @Override
     public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
 
-        List<Element> ts = new ArrayList<>();
-
         try {
             for (String annotationType : this.getSupportedAnnotationTypes()) {
                 Class<? extends Annotation> annotationClass =

nb-api/src/main/java/io/nosqlbench/nb/api/content/ResolverForURL.java

@@ -19,7 +19,6 @@ public class ResolverForURL implements ContentResolver {
 
     @Override
     public List<Content<?>> resolve(URI uri) {
-        List<Content<?>> contents = new ArrayList<>();
         URLContent urlContent = resolveURI(uri);
         if (urlContent!=null) {
             return List.of(urlContent);

nb-api/src/main/java/io/nosqlbench/nb/api/markdown/aggregator/MarkdownDocs.java

@@ -27,13 +27,8 @@ public class MarkdownDocs {
     }
 
     public static List<MarkdownInfo> find(String name, DocScope... scopes) {
-        List<MarkdownInfo> aggregated = new ArrayList<>();
-
         List<Content<?>> markdownContent = RawMarkdownSources.getAllMarkdown();
 
-        // Find all topics and aggregators
-        List<String> aggregators = new ArrayList<>();
-
         List<MarkdownInfo> markdownInfos = markdownContent
             .stream()
             .map(ParsedMarkdown::new)
@@ -78,7 +73,7 @@ public class MarkdownDocs {
         return mdgraph.processed();
 //
 //
-//
+//        List<MarkdownInfo> aggregated = new ArrayList<>();
 //        List<Edge<List<String>>> edges = new ArrayList<>();
 //        List<String> matchedtopics = null;
 //

nb-api/src/test/java/io/nosqlbench/nb/api/markdown/aggregator/MarkdownDocsTest.java

@@ -9,9 +9,9 @@ import java.net.URL;
 import java.nio.file.*;
 import java.util.*;
 import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.assertj.core.api.Assertions.from;
 
 public class MarkdownDocsTest {
 
@@ -74,16 +74,14 @@ public class MarkdownDocsTest {
                 URL url = resources.nextElement();
                 System.out.println("url="+url.toExternalForm());
                 Path path = Paths.get(url.toURI());
-                Files.walk(path, FileVisitOption.FOLLOW_LINKS)
+                try (Stream<Path> fileStream = Files.walk(path, FileVisitOption.FOLLOW_LINKS)) {
-                        .filter(p -> !Files.isDirectory(p, LinkOption.NOFOLLOW_LINKS))
+                    fileStream.filter(p -> !Files.isDirectory(p, LinkOption.NOFOLLOW_LINKS))
                             .forEach(subpaths::add);
                 }
+            }
         } catch (Exception e) {
             throw new RuntimeException(e);
         }
         return subpaths;
-
     }
-
-
 }

virtdata-api/src/main/java/io/nosqlbench/virtdata/api/processors/FunctionManifestProcessor.java

@@ -48,8 +48,6 @@ public class FunctionManifestProcessor extends AbstractProcessor {
     @Override
     public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
 
-        List<Element> ts = new ArrayList<>();
-
         try {
             if (writer==null) {
                 writer = filer.createResource(StandardLocation.CLASS_OUTPUT, "", "META-INF/functions")

virtdata-api/src/main/java/io/nosqlbench/virtdata/core/bindings/FunctionType.java

@@ -24,10 +24,10 @@ public enum FunctionType {
     R_T(Function.class, Object.class, Object.class);
 
     private final Class<?> functionClass;
-    private Class<?> inputClass;
+    private final Class<?> inputClass;
-    private Class<?> returnClass;
+    private final Class<?> returnClass;
-    private ValueType returnValueType;
+    private final ValueType returnValueType;
-    private ValueType inputValueType;
+    private final ValueType inputValueType;
 
     FunctionType(Class<?> functionClass, Class<?> inputClass, Class<?> returnClass) {
         this.functionClass = functionClass;

virtdata-api/src/main/java/io/nosqlbench/virtdata/core/bindings/ValueType.java

@@ -29,7 +29,7 @@ public enum ValueType implements Comparator<ValueType> {
     OBJECT(Object.class, 8);
 
     private final Class<?> clazz;
-    private int precedence;
+    private final int precedence;
 
     ValueType(Class<?> clazz, int precedence) {
         this.clazz = clazz;

virtdata-api/src/main/java/io/nosqlbench/virtdata/core/templates/BindPoint.java

@@ -3,8 +3,8 @@ package io.nosqlbench.virtdata.core.templates;
 import java.util.Objects;
 
 public class BindPoint {
-    private String anchor;
+    private final String anchor;
-    private String bindspec;
+    private final String bindspec;
 
     public BindPoint(String anchor, String bindspec) {
         this.anchor = anchor;
@@ -30,6 +30,11 @@ public class BindPoint {
         return Objects.equals(bindspec, bindPoint.bindspec);
     }
 
+    @Override
+    public int hashCode() {
+        return Objects.hash(anchor, bindspec);
+    }
+
     @Override
     public String toString() {
         return "BindPoint{" +

virtdata-api/src/test/java/io/nosqlbench/virtdata/core/templates/ParsedTemplateTest.java

@@ -13,10 +13,9 @@ import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 
 public class ParsedTemplateTest {
 
-    private final Map<String, String> bindings = new HashMap<>() {{
+    private final Map<String, String> bindings = Map.of(
-        put("bindname1", "bindspec1");
+            "bindname1", "bindspec1",
-        put("bindname2", "bindspec2");
+            "bindname2", "bindspec2");
-    }};
     private final String rawNothing = "This has no anchors";
     private final String oneCurly = "A {curly} brace.";
     private final String oneQuestion = " A ?question anchor.";
@@ -35,7 +34,7 @@ public class ParsedTemplateTest {
     public void testShoudlMatchCurlyBraces() {
         ParsedTemplate pt = new ParsedTemplate(oneCurly, bindings);
         assertThat(pt.getSpans()).containsExactly("A ", "curly", " brace.");
-        assertThat(pt.getSpecificBindings().isEmpty());
+        assertThat(pt.getSpecificBindings()).isEmpty();
         assertThat(pt.getMissingBindings()).contains("curly");
         assertThat(pt.getExtraBindings()).hasSameElementsAs(bindings.keySet());
     }

virtdata-lib-basics/src/main/java/io/nosqlbench/virtdata/library/basics/shared/distributions/CSVSampler.java

@@ -8,7 +8,6 @@ import io.nosqlbench.virtdata.api.annotations.Example;
 import io.nosqlbench.virtdata.api.annotations.ThreadSafeMapper;
 import io.nosqlbench.virtdata.library.basics.core.stathelpers.AliasElementSampler;
 import io.nosqlbench.virtdata.library.basics.core.stathelpers.ElemProbD;
-import io.nosqlbench.virtdata.library.basics.core.stathelpers.EvProbD;
 import io.nosqlbench.virtdata.library.basics.shared.from_long.to_long.Hash;
 import org.apache.commons.csv.CSVParser;
 import org.apache.commons.csv.CSVRecord;
@@ -68,8 +67,6 @@ public class CSVSampler implements LongFunction<String> {
      */
     @Example({"CSVSampler('USPS','n/a','name','census_state_abbrev')",""})
     public CSVSampler(String labelColumn, String weightColumn, String... data) {
-        List<EvProbD> events = new ArrayList<>();
-        List<String> values = new ArrayList<>();
 
         Function<LabeledStatistic, Double> weightFunc = LabeledStatistic::sum;
         LongUnaryOperator prefunc = new Hash();

virtdata-lib-basics/src/main/java/io/nosqlbench/virtdata/library/basics/shared/from_long/to_long/HostHash.java

@@ -20,8 +20,8 @@ import java.util.function.LongUnaryOperator;
  */
 public class HostHash implements LongUnaryOperator {
 
-    private static long hostHash = computeHostHash();
+    private static final long hostHash = computeHostHash();
-    private ByteBuffer bb = ByteBuffer.allocate(Long.BYTES);
+    private final ByteBuffer bb = ByteBuffer.allocate(Long.BYTES);
     private Murmur3F murmur3F;
 
     @Example({"HostHash()","a simple per-host hash function"})
@@ -60,10 +60,10 @@ public class HostHash implements LongUnaryOperator {
                 distinctNames.add(iface.getHostName());
             });
             List<String> nameList = new ArrayList<>(distinctNames);
-            nameList.sort(String::compareTo);
+            Collections.sort(nameList);
             Murmur3F m3f = new Murmur3F(0);
             m3f.reset();
-            distinctNames.forEach(
+            nameList.forEach(
                     s -> m3f.update(s.getBytes(StandardCharsets.UTF_8))
             );
             return m3f.getValue();

virtdata-lib-basics/src/main/java/io/nosqlbench/virtdata/library/basics/shared/from_long/to_object/WeightedFuncs.java

@@ -23,13 +23,11 @@ public class WeightedFuncs implements LongFunction<Object> {
 
     private final LongFunction<Object>[] funcs;
     private final AliasSamplerDoubleInt functionSampler;
-    private HashedDoubleRange unitSampler = new HashedDoubleRange(0.0d, 1.0d);
+    private final HashedDoubleRange unitSampler = new HashedDoubleRange(0.0d, 1.0d);
 
     public WeightedFuncs(Object... weightsAndFuncs) {
-        List<EvProbD> probabilites = new ArrayList<>();
-        List<LongFunction<Object>> functions = new ArrayList<>();
-
         List<EvProbD> probabilities = new ArrayList<>();
+        List<LongFunction<Object>> functions = new ArrayList<>();
 
         if ((weightsAndFuncs.length % 2) != 0) {
             throw new RuntimeException("You must have weights and functions, pairwise." +
@@ -45,7 +43,7 @@ public class WeightedFuncs implements LongFunction<Object> {
             } catch (NumberFormatException nfe) {
                 throw new RuntimeException("the 0th and ever even value must be a floating point weight.");
             }
-            probabilites.add(new EvProbD(i >> 1, weight));
+            probabilities.add(new EvProbD(i >> 1, weight));
 
             Object f = weightsAndFuncs[i + 1];
             try {
@@ -58,7 +56,7 @@ public class WeightedFuncs implements LongFunction<Object> {
             }
         }
         this.funcs = functions.toArray(new LongFunction[0]);
-        this.functionSampler = new AliasSamplerDoubleInt(probabilites);
+        this.functionSampler = new AliasSamplerDoubleInt(probabilities);
     }
 
     @Override

virtdata-lib-basics/src/test/java/io/nosqlbench/virtdata/library/basics/shared/from_long/to_long/ShuffleTest.java

@@ -143,9 +143,9 @@ public class ShuffleTest {
         }
 //        return shuffle.stats;
         return new int[0];
-
     }
 
+    @Test
     public void test16() {
         int max=16;
         Shuffle shuffle = new Shuffle(0,max);
@@ -161,7 +161,6 @@ public class ShuffleTest {
             assertThat(r[i]).isEqualTo(i+1);
         }
 //        System.out.println("resampling stats for " + max + " values: " + Arrays.toString(shuffle.stats));
-
     }
 
     @Test

virtdata-lib-basics/src/test/java/io/nosqlbench/virtdata/library/basics/shared/stateful/ShowTest.java

@@ -23,8 +23,6 @@ public class ShowTest {
         assertThat(showFoo.apply(2342343L)).isEqualTo("{foo=23}");
         assertThat(showBar.apply(23423L)).isEqualTo("{bar=Bar}");
         new Clear().apply(234);
-        assertThat(showAll.apply("234").isEmpty());
+        assertThat(showAll.apply("234")).isEqualTo("{}");
     }
-
-
 }

virtdata-lib-basics/src/test/java/io/nosqlbench/virtdata/library/basics/tests/libraryimpl/BasicDataMappersTest.java

@@ -11,7 +11,6 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 public class BasicDataMappersTest {
 
-
     @Test
     public void testGetDataMapper() throws Exception {
         Optional<DataMapper<Object>> dataMapper = VirtData.getOptionalMapper("StaticStringMapper('foo')");
@@ -52,6 +51,7 @@ public class BasicDataMappersTest {
         assertThat(dataMapper.get()).isNotNull();
         Date d1 = dataMapper.get().get(1);
         Date d2 = dataMapper.get().get(2);
+        assertThat(d2).isAfter(d1);
     }
 
     @Test
@@ -59,7 +59,9 @@ public class BasicDataMappersTest {
         Optional<DataMapper<Date>> dataMapper = VirtData.getOptionalMapper("ToDate(1000,10000)");
         assertThat(dataMapper).isNotNull();
         assertThat(dataMapper.get()).isNotNull();
-        assertThat(dataMapper.get().get(1).after(new Date(1)));
+        assertThat(dataMapper.get().get(0)).isEqualTo(new Date(0));
+        assertThat(dataMapper.get().get(10)).isEqualTo(new Date(1));
+        assertThat(dataMapper.get().get(20)).isEqualTo(new Date(2));
     }
 
     @Test
@@ -69,5 +71,4 @@ public class BasicDataMappersTest {
         assertThat(dataMapper.get()).isNotNull();
         assertThat(dataMapper.get().get(1)).isNotNull();
     }
-
 }

virtdata-lib-basics/src/test/java/io/nosqlbench/virtdata/library/basics/tests/long_timeuuid/ToEpochTimeUUIDTest.java

@@ -22,7 +22,10 @@ public class ToEpochTimeUUIDTest {
             formats.add(formatted);
 
             e = new ToEpochTimeUUID(formatted);
+        }
 
+        for (String formatted : formats) {
+            System.out.println(formatted);
         }
 
         /**

virtdata-lib-curves4/src/main/java/org/apache/commons/math4/stat/descriptive/moment/SemiVariance.java

@@ -340,7 +340,7 @@ public class SemiVariance extends AbstractUnivariateStatistic implements Seriali
          /**
           * boolean value  UPSIDE <-> true
           */
-         private boolean direction;
+         private final boolean direction;
 
          /**
           * Create a Direction with the given value.

virtdata-userlibs/src/test/java/io/virtdata/IntegratedBindingsTest.java

@@ -216,7 +216,7 @@ public class IntegratedBindingsTest {
     public void testDirectFunctionalInterfaceLongUnary() {
         LongUnaryOperator f = VirtData.getFunction("Add(5L)", LongUnaryOperator.class);
         assertThat(f).isNotNull();
-        assertThat(f.getClass()==LongUnaryOperator.class);
+        assertThat(f.getClass()).isEqualTo(io.nosqlbench.virtdata.library.basics.shared.from_long.to_long.Add.class);
     }
 
     @Test

virtdata-userlibs/src/test/java/io/virtdata/IntegratedComposerLogicTest.java

@@ -133,14 +133,13 @@ public class IntegratedComposerLogicTest {
     public void sanityCheckFunctionCasting() {
         Class<?> c1 = NumberNameToString.class;
         Class<?> c2 = LongFunction.class;
-        assertThat(ClassUtils.isAssignable(c1,c2));
+        assertThat(ClassUtils.isAssignable(c1, c2)).isTrue();
 
         Class<?> c3 = Identity.class;
         Class<?> c4 = LongFunction.class;
-        assertThat(ClassUtils.isAssignable(c3,c4));
+        assertThat(ClassUtils.isAssignable(c3, c4)).isTrue();
         LongUnaryOperator f;
         f = new Identity();
-
     }
 
     @Test