Refactored intent framework to deal with batches.

There is still work to be done, but for now, submit, withdraw and reroute are working.

Change-Id: Ib94cf8c4be03786cc070f402d1f296f5dfa6588b

@@ -29,6 +29,7 @@ import org.onlab.onos.net.intent.Intent;
 import org.onlab.onos.net.intent.IntentEvent;
 import org.onlab.onos.net.intent.IntentEvent.Type;
 import org.onlab.onos.net.intent.IntentListener;
+import org.onlab.onos.net.intent.IntentOperations;
 import org.onlab.onos.net.intent.IntentService;
 import org.onlab.onos.net.intent.PointToPointIntent;
 import org.onlab.packet.Ethernet;
@@ -63,9 +64,6 @@ public class IntentPushTestCommand extends AbstractShellCommand
               required = true, multiValued = false)
     String countString = null;
 
-
-    private static long id = 0x7870001;
-
     private IntentService service;
     private CountDownLatch latch;
     private long start, end;
@@ -91,15 +89,18 @@ public class IntentPushTestCommand extends AbstractShellCommand
         service.addListener(this);
         latch = new CountDownLatch(count);
 
-        start = System.currentTimeMillis();
-        for (int i = 0; i < count; i++) {
+        IntentOperations.Builder ops = IntentOperations.builder();
+        for (int i = 1; i <= count; i++) {
             TrafficSelector s = selector
                     .matchEthSrc(MacAddress.valueOf(i))
                     .build();
             Intent intent = new PointToPointIntent(appId(), s, treatment,
                                                    ingress, egress);
-            service.submit(intent);
+            ops.addSubmitOperation(intent);
         }
+        IntentOperations operations = ops.build();
+        start = System.currentTimeMillis();
+        service.execute(operations);
         try {
             if (latch.await(10, TimeUnit.SECONDS)) {
                 printResults(count);

@@ -15,13 +15,13 @@
  */
 package org.onlab.onos.net.flow;
 
-import static com.google.common.base.Preconditions.checkNotNull;
-
 import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
 
+import static com.google.common.base.Preconditions.checkNotNull;
+
 /**
  * A list of BatchOperationEntry.
  *
@@ -88,6 +88,16 @@ public abstract class BatchOperation<T extends BatchOperationEntry<?, ?>> {
         return ops.add(entry) ? this : null;
     }
 
+    /**
+     * Add all operations from another batch to this batch.
+     *
+     * @param another another batch
+     * @return true if success
+     */
+    public boolean addAll(BatchOperation<T> another) {
+        return ops.addAll(another.getOperations());
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) {

@@ -19,12 +19,20 @@ import java.util.Set;
 
 import com.google.common.collect.ImmutableSet;
 
+/**
+ * Representation of a completed flow rule batch operation.
+ */
 public class CompletedBatchOperation implements BatchOperationResult<FlowRule> {
 
-
     private final boolean success;
     private final Set<FlowRule> failures;
 
+    /**
+     * Creates a new batch completion result.
+     *
+     * @param success  indicates whether the completion is successful.
+     * @param failures set of any failures encountered
+     */
     public CompletedBatchOperation(boolean success, Set<? extends FlowRule> failures) {
         this.success = success;
         this.failures = ImmutableSet.copyOf(failures);
@@ -40,5 +48,4 @@ public class CompletedBatchOperation implements BatchOperationResult<FlowRule> {
         return failures;
     }
 
-
 }

+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.onos.net.intent;
+
+/**
+ * Facade for receiving notifications from the intent batch service.
+ */
+public interface IntentBatchDelegate {
+
+    /**
+     * Submits the specified batch of intent operations for processing.
+     *
+     * @param operations batch of operations
+     */
+    void execute(IntentOperations operations);
+
+    /**
+     * Cancesl the specified batch of intent operations.
+     *
+     * @param operations batch of operations to be cancelled
+     */
+    void cancel(IntentOperations operations);
+}

+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.onos.net.intent;
+
+import java.util.Set;
+
+/**
+ * Service for tracking and delegating batches of intent operations.
+ */
+public interface IntentBatchService {
+
+    /**
+     * Submits a batch of intent operations.
+     *
+     * @param operations batch of operations
+     */
+    void addIntentOperations(IntentOperations operations);
+
+    /**
+     * Removes the specified batch of intent operations after completion.
+     *
+     * @param operations batch of operations
+     */
+    void removeIntentOperations(IntentOperations operations);
+
+    /**
+     * Returns the set of intent batches currently being tracked.
+     * @return set of batches
+     */
+    Set<IntentOperations> getIntentOperations();
+
+    /**
+     * Sets the batch service delegate.
+     *
+     * @param delegate delegate to apply
+     */
+    void setDelegate(IntentBatchDelegate delegate);
+
+    /**
+     * Unsets the batch service delegate.
+     *
+     * @param delegate delegate to unset
+     */
+    void unsetDelegate(IntentBatchDelegate delegate);
+
+}

@@ -15,7 +15,10 @@
  */
 package org.onlab.onos.net.intent;
 
+import org.onlab.onos.net.resource.LinkResourceAllocations;
+
 import java.util.List;
+import java.util.Set;
 
 /**
  * Abstraction of a compiler which is capable of taking an intent
@@ -27,9 +30,13 @@ public interface IntentCompiler<T extends Intent> {
     /**
      * Compiles the specified intent into other intents.
      *
-     * @param intent intent to be compiled
+     * @param intent      intent to be compiled
+     * @param installable previously compilation result; optional
+     * @param resources   previously allocated resources; optional
      * @return list of resulting intents
      * @throws IntentException if issues are encountered while compiling the intent
      */
-    List<Intent> compile(T intent);
+    List<Intent> compile(T intent, List<Intent> installable,
+                         Set<LinkResourceAllocations> resources);
+
 }

@@ -15,10 +15,10 @@
  */
 package org.onlab.onos.net.intent;
 
-import java.util.List;
-
 import org.onlab.onos.net.flow.FlowRuleBatchOperation;
 
+import java.util.List;
+
 /**
  * Abstraction of entity capable of installing intents to the environment.
  */
@@ -26,8 +26,8 @@ public interface IntentInstaller<T extends Intent> {
     /**
      * Installs the specified intent to the environment.
      *
-     * @param intent intent to be installed
-     * @return FlowRule operations to install
+     * @param intent    intent to be installed
+     * @return flow rule operations to complete install
      * @throws IntentException if issues are encountered while installing the intent
      */
     List<FlowRuleBatchOperation> install(T intent);
@@ -35,9 +35,20 @@ public interface IntentInstaller<T extends Intent> {
     /**
      * Uninstalls the specified intent from the environment.
      *
-     * @param intent intent to be uninstalled
-     * @return FlowRule operations to uninstall
+     * @param intent    intent to be uninstalled
+     * @return flow rule operations to complete uninstall
      * @throws IntentException if issues are encountered while uninstalling the intent
      */
     List<FlowRuleBatchOperation> uninstall(T intent);
+
+    /**
+     * Replaces the specified intent with a new one in the environment.
+     *
+     * @param oldIntent intent to be removed
+     * @param newIntent intent to be installed
+     * @return flow rule operations to complete the replace
+     * @throws IntentException if issues are encountered while uninstalling the intent
+     */
+    List<FlowRuleBatchOperation> replace(T oldIntent, T newIntent);
+
 }

@@ -15,6 +15,11 @@
  */
 package org.onlab.onos.net.intent;
 
+
+import java.util.Objects;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+
 /**
  * Abstraction of an intent-related operation, e.g. add, remove, replace.
  */
@@ -27,7 +32,7 @@ public class IntentOperation {
     /**
      * Operation type.
      */
-    enum Type {
+    public enum Type {
         /**
          * Indicates that an intent should be added.
          */
@@ -41,15 +46,20 @@ public class IntentOperation {
         /**
          * Indicates that an intent should be replaced with another.
          */
-        REPLACE
+        REPLACE,
+
+        /**
+         * Indicates that an intent should be updated (i.e. recompiled/reinstalled).
+         */
+        UPDATE,
     }
 
     /**
      * Creates an intent operation.
      *
-     * @param type operation type
+     * @param type     operation type
      * @param intentId identifier of the intent subject to the operation
-     * @param intent intent subject
+     * @param intent   intent subject
      */
     IntentOperation(Type type, IntentId intentId, Intent intent) {
         this.type = type;
@@ -85,4 +95,32 @@ public class IntentOperation {
         return intent;
     }
 
+    @Override
+    public int hashCode() {
+        return Objects.hash(type, intentId, intent);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null || getClass() != obj.getClass()) {
+            return false;
+        }
+        final IntentOperation other = (IntentOperation) obj;
+        return Objects.equals(this.type, other.type) &&
+                Objects.equals(this.intentId, other.intentId) &&
+                Objects.equals(this.intent, other.intent);
+    }
+
+
+    @Override
+    public String toString() {
+        return toStringHelper(this)
+                .add("type", type)
+                .add("intentId", intentId)
+                .add("intent", intent)
+                .toString();
+    }
 }

@@ -18,11 +18,11 @@ package org.onlab.onos.net.intent;
 import com.google.common.collect.ImmutableList;
 
 import java.util.List;
+import java.util.Objects;
 
+import static com.google.common.base.MoreObjects.toStringHelper;
 import static com.google.common.base.Preconditions.checkNotNull;
-import static org.onlab.onos.net.intent.IntentOperation.Type.REPLACE;
-import static org.onlab.onos.net.intent.IntentOperation.Type.SUBMIT;
-import static org.onlab.onos.net.intent.IntentOperation.Type.WITHDRAW;
+import static org.onlab.onos.net.intent.IntentOperation.Type.*;
 
 /**
  * Batch of intent submit/withdraw/replace operations.
@@ -58,6 +58,31 @@ public final class IntentOperations {
         return new Builder();
     }
 
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(operations);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null || getClass() != obj.getClass()) {
+            return false;
+        }
+        final IntentOperations other = (IntentOperations) obj;
+        return Objects.equals(this.operations, other.operations);
+    }
+
+    @Override
+    public String toString() {
+        return toStringHelper(this)
+                .add("operations", operations)
+                .toString();
+    }
+
     /**
      * Builder for batches of intent operations.
      */
@@ -108,6 +133,18 @@ public final class IntentOperations {
         }
 
         /**
+         * Adds an intent update operation.
+         *
+         * @param intentId identifier of the intent to be updated
+         * @return self
+         */
+        public Builder addUpdateOperation(IntentId intentId) {
+            checkNotNull(intentId, "Intent ID cannot be null");
+            builder.add(new IntentOperation(UPDATE, intentId, null));
+            return this;
+        }
+
+        /**
          * Builds a batch of intent operations.
          *
          * @return immutable batch of intent operations

@@ -17,7 +17,6 @@ package org.onlab.onos.net.intent;
 
 
 import java.util.List;
-import java.util.concurrent.Future;
 
 /**
  * Service for application submitting or withdrawing their intents.
@@ -59,9 +58,8 @@ public interface IntentService {
      * affected at later time.
      * </p>
      * @param operations batch of intent operations
-     * @return Future to get execution result
      */
-    Future<IntentOperations> execute(IntentOperations operations);
+    void execute(IntentOperations operations);
 
     /**
      * Returns an iterable of intents currently in the system.

@@ -24,7 +24,6 @@ import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
-import java.util.concurrent.Future;
 
 /**
  * Fake implementation of the intent service to assist in developing tests of
@@ -104,7 +103,7 @@ public class FakeIntentManager implements TestableIntentService {
         try {
             // For the fake, we compile using a single level pass
             List<Intent> installable = new ArrayList<>();
-            for (Intent compiled : getCompiler(intent).compile(intent)) {
+            for (Intent compiled : getCompiler(intent).compile(intent, null, null)) {
                 installable.add((Intent) compiled);
             }
             executeInstallingPhase(intent, installable);
@@ -192,9 +191,8 @@ public class FakeIntentManager implements TestableIntentService {
     }
 
     @Override
-    public Future<IntentOperations> execute(IntentOperations operations) {
+    public void execute(IntentOperations operations) {
         // TODO: implement later
-        return null;
     }
 
     @Override

@@ -29,11 +29,13 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Set;
 
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.onlab.onos.net.flow.FlowRuleBatchOperation;
+import org.onlab.onos.net.resource.LinkResourceAllocations;
 
 /**
  * Suite of tests for the intent service contract.
@@ -294,7 +296,8 @@ public class IntentServiceTest {
         }
 
         @Override
-        public List<Intent> compile(TestIntent intent) {
+        public List<Intent> compile(TestIntent intent, List<Intent> installable,
+                                    Set<LinkResourceAllocations> resources) {
             if (fail) {
                 throw new IntentException("compile failed by design");
             }
@@ -326,6 +329,12 @@ public class IntentServiceTest {
             }
             return null;
         }
+
+        @Override
+        public List<FlowRuleBatchOperation> replace(TestInstallableIntent intent,
+                                                    TestInstallableIntent newIntent) {
+            return null;
+        }
     }
 
 }

@@ -509,13 +509,8 @@ public class FlowRuleManager
             boolean success = true;
             Set<FlowRule> failed = Sets.newHashSet();
             CompletedBatchOperation completed;
-            long start = System.nanoTime();
-            long end = start + unit.toNanos(timeout);
-
             for (Future<CompletedBatchOperation> future : futures) {
-                long now = System.nanoTime();
-                long thisTimeout = end - now;
-                completed = future.get(thisTimeout, TimeUnit.NANOSECONDS);
+                completed = future.get(timeout, unit);
                 success = validateBatchOperation(failed, completed);
             }
             return finalizeBatchOperation(success, failed);

@@ -27,9 +27,11 @@ import org.onlab.onos.net.host.HostService;
 import org.onlab.onos.net.intent.HostToHostIntent;
 import org.onlab.onos.net.intent.Intent;
 import org.onlab.onos.net.intent.PathIntent;
+import org.onlab.onos.net.resource.LinkResourceAllocations;
 
 import java.util.Arrays;
 import java.util.List;
+import java.util.Set;
 
 import static org.onlab.onos.net.flow.DefaultTrafficSelector.builder;
 
@@ -54,7 +56,8 @@ public class HostToHostIntentCompiler
     }
 
     @Override
-    public List<Intent> compile(HostToHostIntent intent) {
+    public List<Intent> compile(HostToHostIntent intent, List<Intent> installable,
+                                Set<LinkResourceAllocations> resources) {
         Path pathOne = getPath(intent, intent.one(), intent.two());
         Path pathTwo = getPath(intent, intent.two(), intent.one());
 

@@ -111,6 +111,13 @@ public class LinkCollectionIntentInstaller implements IntentInstaller<LinkCollec
         return Lists.newArrayList(new FlowRuleBatchOperation(rules));
     }
 
+    @Override
+    public List<FlowRuleBatchOperation> replace(LinkCollectionIntent intent,
+                                                LinkCollectionIntent newIntent) {
+        // FIXME: implement
+        return null;
+    }
+
     /**
      * Creates a FlowRuleBatchEntry based on the provided parameters.
      *

@@ -29,6 +29,7 @@ import org.onlab.onos.net.intent.IntentExtensionService;
 import org.onlab.onos.net.intent.LinkCollectionIntent;
 import org.onlab.onos.net.intent.MultiPointToSinglePointIntent;
 import org.onlab.onos.net.intent.PointToPointIntent;
+import org.onlab.onos.net.resource.LinkResourceAllocations;
 import org.onlab.onos.net.topology.PathService;
 
 import java.util.Arrays;
@@ -61,7 +62,8 @@ public class MultiPointToSinglePointIntentCompiler
     }
 
     @Override
-    public List<Intent> compile(MultiPointToSinglePointIntent intent) {
+    public List<Intent> compile(MultiPointToSinglePointIntent intent, List<Intent> installable,
+                                Set<LinkResourceAllocations> resources) {
         Set<Link> links = new HashSet<>();
 
         for (ConnectPoint ingressPoint : intent.ingressPoints()) {

@@ -29,6 +29,7 @@ import org.onlab.onos.net.intent.IntentCompiler;
 import org.onlab.onos.net.intent.IntentExtensionService;
 import org.onlab.onos.net.intent.OpticalConnectivityIntent;
 import org.onlab.onos.net.intent.OpticalPathIntent;
+import org.onlab.onos.net.resource.LinkResourceAllocations;
 import org.onlab.onos.net.topology.LinkWeight;
 import org.onlab.onos.net.topology.Topology;
 import org.onlab.onos.net.topology.TopologyEdge;
@@ -60,7 +61,9 @@ public class OpticalConnectivityIntentCompiler implements IntentCompiler<Optical
     }
 
     @Override
-    public List<Intent> compile(OpticalConnectivityIntent intent) {
+    public List<Intent> compile(OpticalConnectivityIntent intent,
+                                List<Intent> installable,
+                                Set<LinkResourceAllocations> resources) {
         // TODO: compute multiple paths using the K-shortest path algorithm
         Path path = calculateOpticalPath(intent.getSrcConnectPoint(), intent.getDst());
         Intent newIntent = new OpticalPathIntent(intent.appId(),

@@ -104,6 +104,13 @@ public class OpticalPathIntentInstaller implements IntentInstaller<OpticalPathIn
         return generateRules(intent, allocations, FlowRuleOperation.REMOVE);
     }
 
+    @Override
+    public List<FlowRuleBatchOperation> replace(OpticalPathIntent intent,
+                                                OpticalPathIntent newIntent) {
+        // FIXME: implement this
+        return null;
+    }
+
     private LinkResourceAllocations assignWavelength(OpticalPathIntent intent) {
         LinkResourceRequest.Builder request = DefaultLinkResourceRequest.builder(intent.id(),
                                                                                  intent.path().links())

@@ -131,6 +131,15 @@ public class PathIntentInstaller implements IntentInstaller<PathIntent> {
         return Lists.newArrayList(new FlowRuleBatchOperation(rules));
     }
 
+    @Override
+    public List<FlowRuleBatchOperation> replace(PathIntent oldIntent, PathIntent newIntent) {
+        // FIXME: implement this
+        List<FlowRuleBatchOperation> batches = Lists.newArrayList();
+        batches.addAll(uninstall(oldIntent));
+        batches.addAll(install(newIntent));
+        return batches;
+    }
+
     /**
      * Allocate resources required for an intent.
      *
@@ -147,7 +156,7 @@ public class PathIntentInstaller implements IntentInstaller<PathIntent> {
         return request.resources().isEmpty() ? null : resourceService.requestResources(request);
     }
 
-    // TODO refactor below this line... ----------------------------
+    // FIXME refactor below this line... ----------------------------
 
     /**
      * Generates the series of MatchActionOperations from the

@@ -28,9 +28,11 @@ import org.onlab.onos.net.intent.Intent;
 import org.onlab.onos.net.intent.PathIntent;
 import org.onlab.onos.net.intent.PointToPointIntent;
 import org.onlab.onos.net.provider.ProviderId;
+import org.onlab.onos.net.resource.LinkResourceAllocations;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 
 import static java.util.Arrays.asList;
 import static org.onlab.onos.net.Link.Type.DIRECT;
@@ -57,7 +59,9 @@ public class PointToPointIntentCompiler
     }
 
     @Override
-    public List<Intent> compile(PointToPointIntent intent) {
+    public List<Intent> compile(PointToPointIntent intent, List<Intent> installable,
+                Set<LinkResourceAllocations> resources) {
+
         ConnectPoint ingressPoint = intent.ingressPoint();
         ConnectPoint egressPoint = intent.egressPoint();
 

@@ -87,7 +87,7 @@ public class PathConstraintCalculationTest {
                                        constraints);
         final PointToPointIntentCompiler compiler = makeCompiler(resourceService);
 
-        return compiler.compile(intent);
+        return compiler.compile(intent, null, null);
     }
 
     /**

@@ -121,7 +121,7 @@ public class TestHostToHostIntentCompiler {
         HostToHostIntentCompiler compiler = makeCompiler(hops);
         assertThat(compiler, is(notNullValue()));
 
-        List<Intent> result = compiler.compile(intent);
+        List<Intent> result = compiler.compile(intent, null, null);
         assertThat(result, is(Matchers.notNullValue()));
         assertThat(result, hasSize(2));
         Intent forwardResultIntent = result.get(0);

@@ -137,7 +137,7 @@ public class TestMultiPointToSinglePointIntentCompiler {
         MultiPointToSinglePointIntentCompiler compiler = makeCompiler(hops);
         assertThat(compiler, is(notNullValue()));
 
-        List<Intent> result = compiler.compile(intent);
+        List<Intent> result = compiler.compile(intent, null, null);
         assertThat(result, is(Matchers.notNullValue()));
         assertThat(result, hasSize(1));
         Intent resultIntent = result.get(0);
@@ -172,7 +172,7 @@ public class TestMultiPointToSinglePointIntentCompiler {
         MultiPointToSinglePointIntentCompiler compiler = makeCompiler(hops);
         assertThat(compiler, is(notNullValue()));
 
-        List<Intent> result = compiler.compile(intent);
+        List<Intent> result = compiler.compile(intent, null, null);
         assertThat(result, is(notNullValue()));
         assertThat(result, hasSize(1));
         Intent resultIntent = result.get(0);
@@ -205,7 +205,7 @@ public class TestMultiPointToSinglePointIntentCompiler {
         MultiPointToSinglePointIntentCompiler compiler = makeCompiler(hops);
         assertThat(compiler, is(notNullValue()));
 
-        List<Intent> result = compiler.compile(intent);
+        List<Intent> result = compiler.compile(intent, null, null);
         assertThat(result, is(notNullValue()));
         assertThat(result, hasSize(1));
         Intent resultIntent = result.get(0);

@@ -93,7 +93,7 @@ public class TestPointToPointIntentCompiler {
         PointToPointIntentCompiler compiler = makeCompiler(hops);
         assertThat(compiler, is(notNullValue()));
 
-        List<Intent> result = compiler.compile(intent);
+        List<Intent> result = compiler.compile(intent, null, null);
         assertThat(result, is(Matchers.notNullValue()));
         assertThat(result, hasSize(1));
         Intent forwardResultIntent = result.get(0);
@@ -126,7 +126,7 @@ public class TestPointToPointIntentCompiler {
         PointToPointIntentCompiler compiler = makeCompiler(hops);
         assertThat(compiler, is(notNullValue()));
 
-        List<Intent> result = compiler.compile(intent);
+        List<Intent> result = compiler.compile(intent, null, null);
         assertThat(result, is(Matchers.notNullValue()));
         assertThat(result, hasSize(1));
         Intent reverseResultIntent = result.get(0);
@@ -157,7 +157,7 @@ public class TestPointToPointIntentCompiler {
         String[] hops = {"1"};
         PointToPointIntentCompiler sut = makeCompiler(hops);
 
-        List<Intent> compiled = sut.compile(intent);
+        List<Intent> compiled = sut.compile(intent, null, null);
 
         assertThat(compiled, hasSize(1));
         assertThat(compiled.get(0), is(instanceOf(PathIntent.class)));

+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.onos.store.trivial.impl;
+
+import com.google.common.collect.ImmutableSet;
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Service;
+import org.onlab.onos.net.intent.IntentBatchDelegate;
+import org.onlab.onos.net.intent.IntentBatchService;
+import org.onlab.onos.net.intent.IntentOperations;
+import org.slf4j.Logger;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static com.google.common.base.Preconditions.checkState;
+import static org.slf4j.LoggerFactory.getLogger;
+
+@Component(immediate = true)
+@Service
+public class SimpleIntentBatchQueue implements IntentBatchService {
+
+    private final Logger log = getLogger(getClass());
+    private final Set<IntentOperations> pendingBatches = new HashSet<>();
+    private IntentBatchDelegate delegate;
+
+    @Activate
+    public void activate() {
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        log.info("Stopped");
+    }
+
+    @Override
+    public void addIntentOperations(IntentOperations operations) {
+        checkState(delegate != null, "No delegate set");
+        pendingBatches.add(operations);
+        delegate.execute(operations);
+    }
+
+    @Override
+    public void removeIntentOperations(IntentOperations operations) {
+        pendingBatches.remove(operations);
+    }
+
+    @Override
+    public Set<IntentOperations> getIntentOperations() {
+        return ImmutableSet.copyOf(pendingBatches);
+    }
+
+    @Override
+    public void setDelegate(IntentBatchDelegate delegate) {
+        this.delegate = checkNotNull(delegate, "Delegate cannot be null");
+    }
+
+    @Override
+    public void unsetDelegate(IntentBatchDelegate delegate) {
+        if (this.delegate != null && this.delegate.equals(delegate)) {
+            this.delegate = null;
+        }
+    }
+}

@@ -33,7 +33,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
-import static org.onlab.onos.net.intent.IntentState.*;
+import static org.onlab.onos.net.intent.IntentState.WITHDRAWN;
 import static org.slf4j.LoggerFactory.getLogger;
 
 @Component(immediate = true)
@@ -45,8 +45,8 @@ public class SimpleIntentStore
     private final Logger log = getLogger(getClass());
     private final Map<IntentId, Intent> intents = new ConcurrentHashMap<>();
     private final Map<IntentId, IntentState> states = new ConcurrentHashMap<>();
-    private final Map<IntentId, List<Intent>> installable =
-            new ConcurrentHashMap<>();
+    private final Map<IntentId, List<Intent>> installable = new ConcurrentHashMap<>();
+
 
     @Activate
     public void activate() {
@@ -60,6 +60,9 @@ public class SimpleIntentStore
 
     @Override
     public IntentEvent createIntent(Intent intent) {
+        if (intents.containsKey(intent.id())) {
+            return null;
+        }
         intents.put(intent.id(), intent);
         return this.setState(intent, IntentState.SUBMITTED);
     }