diff --git a/driver-http/src/main/java/io/nosqlbench/activitytype/cmds/ReadyHttpOp.java b/driver-http/src/main/java/io/nosqlbench/activitytype/cmds/ReadyHttpOp.java
index de3243449..0e3d1c4f8 100644
--- a/driver-http/src/main/java/io/nosqlbench/activitytype/cmds/ReadyHttpOp.java
+++ b/driver-http/src/main/java/io/nosqlbench/activitytype/cmds/ReadyHttpOp.java
@@ -1,6 +1,7 @@
 package io.nosqlbench.activitytype.cmds;
 
 import io.nosqlbench.engine.api.activityconfig.yaml.OpTemplate;
+import io.nosqlbench.engine.api.activityimpl.OpDispenser;
 import io.nosqlbench.engine.api.templating.CommandTemplate;
 import io.nosqlbench.nb.api.errors.BasicError;
 
@@ -13,10 +14,9 @@ import java.time.temporal.ChronoUnit;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
-import java.util.function.LongFunction;
 import java.util.regex.Pattern;
 
-public class ReadyHttpOp implements LongFunction<HttpOp> {
+public class ReadyHttpOp implements OpDispenser<HttpOp> {
 
     private final CommandTemplate propertyTemplate;
     public static final String DEFAULT_OK_BODY = ".+?";
diff --git a/driver-http/src/main/java/io/nosqlbench/activitytype/http/HttpAction.java b/driver-http/src/main/java/io/nosqlbench/activitytype/http/HttpAction.java
index 31e21abbe..7e0825378 100644
--- a/driver-http/src/main/java/io/nosqlbench/activitytype/http/HttpAction.java
+++ b/driver-http/src/main/java/io/nosqlbench/activitytype/http/HttpAction.java
@@ -6,6 +6,7 @@ import io.nosqlbench.engine.api.activityapi.core.SyncAction;
 import io.nosqlbench.engine.api.activityapi.errorhandling.modular.ErrorDetail;
 import io.nosqlbench.engine.api.activityapi.planning.OpSequence;
 import io.nosqlbench.engine.api.activityimpl.ActivityDef;
+import io.nosqlbench.engine.api.activityimpl.OpDispenser;
 import io.nosqlbench.nb.api.errors.BasicError;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -29,7 +30,7 @@ public class HttpAction implements SyncAction {
     private final int slot;
     private int maxTries = 1;
 
-    private OpSequence<LongFunction<HttpOp>> sequencer;
+    private OpSequence<OpDispenser<HttpOp>> sequencer;
     private HttpClient client;
 
     private final HttpResponse.BodyHandler<String> bodyreader = HttpResponse.BodyHandlers.ofString();
diff --git a/driver-http/src/main/java/io/nosqlbench/activitytype/http/HttpActivity.java b/driver-http/src/main/java/io/nosqlbench/activitytype/http/HttpActivity.java
index 556938a04..1dd776ed4 100644
--- a/driver-http/src/main/java/io/nosqlbench/activitytype/http/HttpActivity.java
+++ b/driver-http/src/main/java/io/nosqlbench/activitytype/http/HttpActivity.java
@@ -10,6 +10,7 @@ import io.nosqlbench.engine.api.activityapi.core.ActivityDefObserver;
 import io.nosqlbench.engine.api.activityapi.errorhandling.modular.NBErrorHandler;
 import io.nosqlbench.engine.api.activityapi.planning.OpSequence;
 import io.nosqlbench.engine.api.activityimpl.ActivityDef;
+import io.nosqlbench.engine.api.activityimpl.OpDispenser;
 import io.nosqlbench.engine.api.activityimpl.SimpleActivity;
 import io.nosqlbench.engine.api.metrics.ActivityMetrics;
 import org.apache.logging.log4j.LogManager;
@@ -17,7 +18,6 @@ import org.apache.logging.log4j.Logger;
 
 import java.net.http.HttpClient;
 import java.util.function.Function;
-import java.util.function.LongFunction;
 
 public class HttpActivity extends SimpleActivity implements Activity, ActivityDefObserver {
     private final static Logger logger = LogManager.getLogger(HttpActivity.class);
@@ -37,7 +37,7 @@ public class HttpActivity extends SimpleActivity implements Activity, ActivityDe
     public Timer resultSuccessTimer;
     public Histogram statusCodeHisto;
 
-    private OpSequence<LongFunction<HttpOp>> sequencer;
+    private OpSequence<OpDispenser<HttpOp>> sequencer;
     private boolean diagnosticsEnabled;
     private long timeout = Long.MAX_VALUE;
     private NBErrorHandler errorhandler;
@@ -129,7 +129,7 @@ public class HttpActivity extends SimpleActivity implements Activity, ActivityDe
         return builder.build();
     }
 
-    public OpSequence<LongFunction<HttpOp>> getSequencer() {
+    public OpSequence<OpDispenser<HttpOp>> getSequencer() {
         return sequencer;
     }
 
diff --git a/driver-http/src/main/java/io/nosqlbench/activitytype/http/async/HttpAsyncAction.java b/driver-http/src/main/java/io/nosqlbench/activitytype/http/async/HttpAsyncAction.java
index 7f22da4de..ec6f97813 100644
--- a/driver-http/src/main/java/io/nosqlbench/activitytype/http/async/HttpAsyncAction.java
+++ b/driver-http/src/main/java/io/nosqlbench/activitytype/http/async/HttpAsyncAction.java
@@ -6,6 +6,7 @@ import io.nosqlbench.activitytype.http.HttpActivity;
 import io.nosqlbench.engine.api.activityapi.core.BaseAsyncAction;
 import io.nosqlbench.engine.api.activityapi.core.ops.fluent.opfacets.TrackedOp;
 import io.nosqlbench.engine.api.activityapi.planning.OpSequence;
+import io.nosqlbench.engine.api.activityimpl.OpDispenser;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
@@ -18,7 +19,7 @@ public class HttpAsyncAction extends BaseAsyncAction<HttpAsyncOp, HttpActivity>
 
     private final static Logger logger = LogManager.getLogger(HttpAsyncAction.class);
 
-    private OpSequence<LongFunction<HttpOp>> sequencer;
+    private OpSequence<OpDispenser<HttpOp>> sequencer;
     private HttpClient client;
 
     private CompletableFuture<HttpResponse<Void>> future;
diff --git a/driver-jdbc/src/main/java/io/nosqlbench/activitytype/jdbc/api/JDBCActivity.java b/driver-jdbc/src/main/java/io/nosqlbench/activitytype/jdbc/api/JDBCActivity.java
index 7d3c9ffe0..baa42302e 100644
--- a/driver-jdbc/src/main/java/io/nosqlbench/activitytype/jdbc/api/JDBCActivity.java
+++ b/driver-jdbc/src/main/java/io/nosqlbench/activitytype/jdbc/api/JDBCActivity.java
@@ -8,6 +8,7 @@ import com.zaxxer.hikari.HikariDataSource;
 import io.nosqlbench.activitytype.jdbc.impl.ReadyJDBCOp;
 import io.nosqlbench.engine.api.activityapi.planning.OpSequence;
 import io.nosqlbench.engine.api.activityimpl.ActivityDef;
+import io.nosqlbench.engine.api.activityimpl.OpDispenser;
 import io.nosqlbench.engine.api.activityimpl.SimpleActivity;
 import io.nosqlbench.engine.api.metrics.ActivityMetrics;
 import io.nosqlbench.engine.api.metrics.ExceptionCountMetrics;
@@ -17,7 +18,6 @@ import org.apache.logging.log4j.Logger;
 import javax.sql.DataSource;
 import java.sql.SQLException;
 import java.util.concurrent.ConcurrentHashMap;
-import java.util.function.LongFunction;
 
 // This should not be exposed as as service directly unless it can
 // be used with a modular JDBC configuration.
@@ -31,7 +31,7 @@ public abstract class JDBCActivity extends SimpleActivity {
     private SQLExceptionCountMetrics sqlExceptionCount;
 
     protected DataSource dataSource;
-    protected OpSequence<LongFunction<String>> opSequence;
+    protected OpSequence<OpDispenser<String>> opSequence;
 
     public JDBCActivity(ActivityDef activityDef) {
         super(activityDef);
@@ -91,7 +91,7 @@ public abstract class JDBCActivity extends SimpleActivity {
         return dataSource;
     }
 
-    public OpSequence<LongFunction<String>> getOpSequence() {
+    public OpSequence<OpDispenser<String>> getOpSequence() {
         return opSequence;
     }
 
diff --git a/driver-jdbc/src/main/java/io/nosqlbench/activitytype/jdbc/impl/JDBCAction.java b/driver-jdbc/src/main/java/io/nosqlbench/activitytype/jdbc/impl/JDBCAction.java
index b610932df..da220fff1 100644
--- a/driver-jdbc/src/main/java/io/nosqlbench/activitytype/jdbc/impl/JDBCAction.java
+++ b/driver-jdbc/src/main/java/io/nosqlbench/activitytype/jdbc/impl/JDBCAction.java
@@ -4,6 +4,7 @@ import com.codahale.metrics.Timer;
 import io.nosqlbench.activitytype.jdbc.api.JDBCActivity;
 import io.nosqlbench.engine.api.activityapi.core.SyncAction;
 import io.nosqlbench.engine.api.activityapi.planning.OpSequence;
+import io.nosqlbench.engine.api.activityimpl.OpDispenser;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
@@ -17,7 +18,7 @@ public class JDBCAction implements SyncAction {
     private static final Logger LOGGER = LogManager.getLogger(JDBCAction.class);
 
     private final JDBCActivity activity;
-    private OpSequence<LongFunction<String>> sequencer;
+    private OpSequence<OpDispenser<String>> sequencer;
 
     public JDBCAction(JDBCActivity a, int slot) {
         activity = a;
diff --git a/driver-jdbc/src/main/java/io/nosqlbench/activitytype/jdbc/impl/ReadyJDBCOp.java b/driver-jdbc/src/main/java/io/nosqlbench/activitytype/jdbc/impl/ReadyJDBCOp.java
index 4734e59ac..74258d559 100644
--- a/driver-jdbc/src/main/java/io/nosqlbench/activitytype/jdbc/impl/ReadyJDBCOp.java
+++ b/driver-jdbc/src/main/java/io/nosqlbench/activitytype/jdbc/impl/ReadyJDBCOp.java
@@ -1,14 +1,13 @@
 package io.nosqlbench.activitytype.jdbc.impl;
 
 import io.nosqlbench.engine.api.activityconfig.yaml.OpTemplate;
+import io.nosqlbench.engine.api.activityimpl.OpDispenser;
 import io.nosqlbench.virtdata.core.bindings.BindingsTemplate;
 import io.nosqlbench.virtdata.core.templates.ParsedTemplate;
 import io.nosqlbench.virtdata.core.templates.StringBindings;
 import io.nosqlbench.virtdata.core.templates.StringBindingsTemplate;
 
-import java.util.function.LongFunction;
-
-public class ReadyJDBCOp implements LongFunction<String> {
+public class ReadyJDBCOp implements OpDispenser<String> {
     private final StringBindings bindings;
 
     public ReadyJDBCOp(OpTemplate stmtDef) {
diff --git a/driver-jmx/src/main/java/io/nosqlbench/driver/jmx/JMXAction.java b/driver-jmx/src/main/java/io/nosqlbench/driver/jmx/JMXAction.java
index 457c70327..dbd32b7ef 100644
--- a/driver-jmx/src/main/java/io/nosqlbench/driver/jmx/JMXAction.java
+++ b/driver-jmx/src/main/java/io/nosqlbench/driver/jmx/JMXAction.java
@@ -4,6 +4,7 @@ import io.nosqlbench.driver.jmx.ops.JmxOp;
 import io.nosqlbench.engine.api.activityapi.core.SyncAction;
 import io.nosqlbench.engine.api.activityapi.planning.OpSequence;
 import io.nosqlbench.engine.api.activityimpl.ActivityDef;
+import io.nosqlbench.engine.api.activityimpl.OpDispenser;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
@@ -16,7 +17,7 @@ public class JMXAction implements SyncAction {
     private final ActivityDef activityDef;
     private final int slot;
     private final JMXActivity activity;
-    private OpSequence<LongFunction<JmxOp>> sequencer;
+    private OpSequence<OpDispenser<JmxOp>> sequencer;
 
     public JMXAction(ActivityDef activityDef, int slot, JMXActivity activity) {
         this.activityDef = activityDef;
diff --git a/driver-jmx/src/main/java/io/nosqlbench/driver/jmx/JMXActivity.java b/driver-jmx/src/main/java/io/nosqlbench/driver/jmx/JMXActivity.java
index 5948eacbe..7fbe758e2 100644
--- a/driver-jmx/src/main/java/io/nosqlbench/driver/jmx/JMXActivity.java
+++ b/driver-jmx/src/main/java/io/nosqlbench/driver/jmx/JMXActivity.java
@@ -4,15 +4,15 @@ import io.nosqlbench.driver.jmx.ops.JmxOp;
 import io.nosqlbench.engine.api.activityapi.core.Activity;
 import io.nosqlbench.engine.api.activityapi.planning.OpSequence;
 import io.nosqlbench.engine.api.activityimpl.ActivityDef;
+import io.nosqlbench.engine.api.activityimpl.OpDispenser;
 import io.nosqlbench.engine.api.activityimpl.SimpleActivity;
 import io.nosqlbench.engine.api.util.SSLKsFactory;
 
 import javax.net.ssl.SSLContext;
-import java.util.function.LongFunction;
 
 public class JMXActivity extends SimpleActivity implements Activity {
 
-    private OpSequence<LongFunction<JmxOp>> sequence;
+    private OpSequence<OpDispenser<JmxOp>> sequence;
     private SSLContext sslContext;
 
     public JMXActivity(ActivityDef activityDef) {
@@ -37,7 +37,7 @@ public class JMXActivity extends SimpleActivity implements Activity {
         return sslContext;
     }
 
-    public OpSequence<LongFunction<JmxOp>> getSequencer() {
+    public OpSequence<OpDispenser<JmxOp>> getSequencer() {
         return sequence;
     }
 }
diff --git a/driver-jmx/src/main/java/io/nosqlbench/driver/jmx/ReadyJmxOp.java b/driver-jmx/src/main/java/io/nosqlbench/driver/jmx/ReadyJmxOp.java
index 7fafac0ad..5cee26350 100644
--- a/driver-jmx/src/main/java/io/nosqlbench/driver/jmx/ReadyJmxOp.java
+++ b/driver-jmx/src/main/java/io/nosqlbench/driver/jmx/ReadyJmxOp.java
@@ -4,6 +4,7 @@ import io.nosqlbench.driver.jmx.ops.JMXExplainOperation;
 import io.nosqlbench.driver.jmx.ops.JMXPrintOperation;
 import io.nosqlbench.driver.jmx.ops.JMXReadOperation;
 import io.nosqlbench.driver.jmx.ops.JmxOp;
+import io.nosqlbench.engine.api.activityimpl.OpDispenser;
 import io.nosqlbench.engine.api.templating.CommandTemplate;
 
 import javax.management.MalformedObjectNameException;
@@ -16,9 +17,8 @@ import java.net.MalformedURLException;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
-import java.util.function.LongFunction;
 
-public class ReadyJmxOp implements LongFunction<JmxOp> {
+public class ReadyJmxOp implements OpDispenser<JmxOp> {
 
     private final CommandTemplate command;
 
diff --git a/driver-pulsar/src/main/java/io/nosqlbench/driver/pulsar/PulsarActivity.java b/driver-pulsar/src/main/java/io/nosqlbench/driver/pulsar/PulsarActivity.java
index b720a59af..cfef64528 100644
--- a/driver-pulsar/src/main/java/io/nosqlbench/driver/pulsar/PulsarActivity.java
+++ b/driver-pulsar/src/main/java/io/nosqlbench/driver/pulsar/PulsarActivity.java
@@ -8,12 +8,12 @@ import io.nosqlbench.engine.api.activityapi.core.ActivityDefObserver;
 import io.nosqlbench.engine.api.activityapi.errorhandling.modular.NBErrorHandler;
 import io.nosqlbench.engine.api.activityapi.planning.OpSequence;
 import io.nosqlbench.engine.api.activityimpl.ActivityDef;
+import io.nosqlbench.engine.api.activityimpl.OpDispenser;
 import io.nosqlbench.engine.api.activityimpl.SimpleActivity;
 import io.nosqlbench.engine.api.metrics.ActivityMetrics;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
-import java.util.function.LongFunction;
 import java.util.function.Supplier;
 
 public class PulsarActivity extends SimpleActivity implements ActivityDefObserver {
@@ -28,7 +28,7 @@ public class PulsarActivity extends SimpleActivity implements ActivityDefObserve
 
     private PulsarNBClientConf clientConf;
 
-    private OpSequence<LongFunction<PulsarOp>> sequencer;
+    private OpSequence<OpDispenser<PulsarOp>> sequencer;
     // private PulsarClient activityClient;
 
     private Supplier<PulsarSpace> clientSupplier;
@@ -65,7 +65,7 @@ public class PulsarActivity extends SimpleActivity implements ActivityDefObserve
         super.onActivityDefUpdate(activityDef);
     }
 
-    public OpSequence<LongFunction<PulsarOp>> getSequencer() {
+    public OpSequence<OpDispenser<PulsarOp>> getSequencer() {
         return sequencer;
     }
 
diff --git a/driver-pulsar/src/main/java/io/nosqlbench/driver/pulsar/ops/ReadyPulsarOp.java b/driver-pulsar/src/main/java/io/nosqlbench/driver/pulsar/ops/ReadyPulsarOp.java
index 82272150f..6ef854c7a 100644
--- a/driver-pulsar/src/main/java/io/nosqlbench/driver/pulsar/ops/ReadyPulsarOp.java
+++ b/driver-pulsar/src/main/java/io/nosqlbench/driver/pulsar/ops/ReadyPulsarOp.java
@@ -1,10 +1,10 @@
 package io.nosqlbench.driver.pulsar.ops;
 
-import io.nosqlbench.driver.pulsar.util.PulsarActivityUtil;
 import io.nosqlbench.driver.pulsar.PulsarSpace;
 import io.nosqlbench.driver.pulsar.PulsarSpaceCache;
-import io.nosqlbench.driver.pulsar.util.PulsarNBClientConf;
+import io.nosqlbench.driver.pulsar.util.PulsarActivityUtil;
 import io.nosqlbench.engine.api.activityconfig.yaml.OpTemplate;
+import io.nosqlbench.engine.api.activityimpl.OpDispenser;
 import io.nosqlbench.engine.api.scoping.ScopedSupplier;
 import io.nosqlbench.engine.api.templating.CommandTemplate;
 import org.apache.pulsar.client.api.Producer;
@@ -13,7 +13,7 @@ import org.apache.pulsar.client.api.Schema;
 import java.util.function.LongFunction;
 import java.util.function.Supplier;
 
-public class ReadyPulsarOp implements LongFunction<PulsarOp> {
+public class ReadyPulsarOp implements OpDispenser<PulsarOp> {
 
     private final CommandTemplate cmdTpl;
     private final PulsarSpace clientSpace;
diff --git a/engine-api/src/main/java/io/nosqlbench/engine/api/activityimpl/OpDispenser.java b/engine-api/src/main/java/io/nosqlbench/engine/api/activityimpl/OpDispenser.java
new file mode 100644
index 000000000..3fc806229
--- /dev/null
+++ b/engine-api/src/main/java/io/nosqlbench/engine/api/activityimpl/OpDispenser.java
@@ -0,0 +1,6 @@
+package io.nosqlbench.engine.api.activityimpl;
+
+import java.util.function.LongFunction;
+
+public interface OpDispenser<T> extends LongFunction<T> {
+}
diff --git a/engine-api/src/main/java/io/nosqlbench/engine/api/activityimpl/SimpleActivity.java b/engine-api/src/main/java/io/nosqlbench/engine/api/activityimpl/SimpleActivity.java
index c29acd436..909abf921 100644
--- a/engine-api/src/main/java/io/nosqlbench/engine/api/activityimpl/SimpleActivity.java
+++ b/engine-api/src/main/java/io/nosqlbench/engine/api/activityimpl/SimpleActivity.java
@@ -409,9 +409,9 @@ public class SimpleActivity implements Activity, ProgressCapable {
      * @param <O>
      * @return
      */
-    protected <O> OpSequence<LongFunction<O>> createOpSequenceFromCommands(Function<CommandTemplate, LongFunction<O>> opinit) {
+    protected <O> OpSequence<OpDispenser<O>> createOpSequenceFromCommands(Function<CommandTemplate, OpDispenser<O>> opinit) {
         Function<OpTemplate, CommandTemplate> f = CommandTemplate::new;
-        Function<OpTemplate, LongFunction<O>> opTemplateOFunction = f.andThen(opinit);
+        Function<OpTemplate, OpDispenser<O>> opTemplateOFunction = f.andThen(opinit);
 
         return createOpSequence(opTemplateOFunction);
     }
@@ -438,14 +438,14 @@ public class SimpleActivity implements Activity, ProgressCapable {
      * @param <O>    A holder for an executable operation for the native driver used by this activity.
      * @return The sequence of operations as determined by filtering and ratios
      */
-    protected <O> OpSequence<LongFunction<O>> createOpSequence(Function<OpTemplate, LongFunction<O>> opinit) {
+    protected <O> OpSequence<OpDispenser<O>> createOpSequence(Function<OpTemplate, OpDispenser<O>> opinit) {
         String tagfilter = activityDef.getParams().getOptionalString("tags").orElse("");
         StrInterpolator interp = new StrInterpolator(activityDef);
         SequencerType sequencerType = getParams()
             .getOptionalString("seq")
             .map(SequencerType::valueOf)
             .orElse(SequencerType.bucket);
-        SequencePlanner<LongFunction<O>> planner = new SequencePlanner<>(sequencerType);
+        SequencePlanner<OpDispenser<O>> planner = new SequencePlanner<>(sequencerType);
 
         StmtsDocList stmtsDocList = null;
 
@@ -471,7 +471,7 @@ public class SimpleActivity implements Activity, ProgressCapable {
         for (int i = 0; i < stmts.size(); i++) {
             long ratio = ratios.get(i);
             OpTemplate optemplate = stmts.get(i);
-            LongFunction<O> driverSpecificReadyOp = opinit.apply(optemplate);
+            OpDispenser<O> driverSpecificReadyOp = opinit.apply(optemplate);
             planner.addOp(driverSpecificReadyOp, ratio);
         }