Github user uce commented on a diff in the pull request:
https://github.com/apache/incubator-flink/pull/254#discussion_r21560517
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/IntermediateResultPartition.java
---
@@ -0,0 +1,266 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.apache.flink.runtime.io.network.partition;
+
+import com.google.common.base.Optional;
+import
org.apache.flink.runtime.deployment.IntermediateResultPartitionDeploymentDescriptor;
+import org.apache.flink.runtime.executiongraph.ExecutionAttemptID;
+import org.apache.flink.runtime.executiongraph.ExecutionVertex;
+import org.apache.flink.runtime.io.network.NetworkEnvironment;
+import org.apache.flink.runtime.io.network.buffer.Buffer;
+import org.apache.flink.runtime.io.network.buffer.BufferPool;
+import org.apache.flink.runtime.io.network.buffer.BufferPoolOwner;
+import org.apache.flink.runtime.io.network.buffer.BufferProvider;
+import org.apache.flink.runtime.io.network.buffer.LocalBufferPool;
+import
org.apache.flink.runtime.io.network.partition.queue.ConsumableOnceInMemoryOnlyPartitionQueue;
+import
org.apache.flink.runtime.io.network.partition.queue.IllegalQueueIteratorRequestException;
+import
org.apache.flink.runtime.io.network.partition.queue.IntermediateResultPartitionQueue;
+import
org.apache.flink.runtime.io.network.partition.queue.IntermediateResultPartitionQueueIterator;
+import org.apache.flink.runtime.jobgraph.IntermediateResultPartitionID;
+import org.apache.flink.runtime.jobgraph.IntermediateResultType;
+import org.apache.flink.runtime.jobgraph.JobID;
+import org.apache.flink.runtime.protocols.ConsumerNotificationProtocol;
+import org.apache.flink.runtime.protocols.ConsumerNotificationResult;
+
+import java.io.IOException;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static com.google.common.base.Preconditions.checkState;
+
+public class IntermediateResultPartition implements BufferPoolOwner {
+
+ /**
+ * Note: This index needs to correspond to the index of the partition in
+ * {@link ExecutionVertex#resultPartitions}, which might be a little
+ * fragile as the data availability notifications use it.
+ */
+ private final int partitionIndex;
+
+ private final JobID jobId;
+
+ private final ExecutionAttemptID executionId;
+
+ private final IntermediateResultPartitionID partitionId;
+
+ private final IntermediateResultType partitionType;
+
+ private final BufferPool bufferPool;
+
+ private final ConsumerNotificationProtocol notificationProtocol;
+
+ private final IntermediateResultPartitionQueue[] queues;
+
+ private boolean hasNotifiedConsumers;
+
+ private boolean isReleased;
+
+ private boolean isFinished;
+
+ public IntermediateResultPartition(
+ int partitionIndex,
+ JobID jobId,
+ ExecutionAttemptID executionId,
+ NetworkEnvironment networkEnvironment,
+ IntermediateResultPartitionDeploymentDescriptor irpdd)
throws IOException {
+
+ this.partitionIndex = partitionIndex;
+ this.jobId = checkNotNull(jobId);
+ this.executionId = checkNotNull(executionId);
+
+ this.partitionId = checkNotNull(irpdd.getPartitionId());
+ this.queues = new
IntermediateResultPartitionQueue[irpdd.getNumberOfQueues()];
+ this.partitionType = irpdd.getPartitionType();
+
+ this.bufferPool =
networkEnvironment.getNetworkBufferPool().createBufferPool(irpdd.getNumberOfQueues(),
false);
+ this.notificationProtocol =
networkEnvironment.getNotificationProtocol();
+
+ // TODO The queues need to be created depending on the result
type
+ for (int i = 0; i < queues.length; i++) {
+ queues[i] = new
ConsumableOnceInMemoryOnlyPartitionQueue();
+ }
+ }
+
+ //
------------------------------------------------------------------------
+ // Properties
+ //
------------------------------------------------------------------------
+
+ public IntermediateResultPartitionID getPartitionId() {
+ return partitionId;
+ }
+
+ public JobID getJobId() {
+ return jobId;
+ }
+
+ public int getNumberOfQueues() {
+ return queues.length;
+ }
+
+ public BufferProvider getBufferProvider() {
+ return bufferPool;
+ }
+
+ public boolean isFinished() {
+ return isFinished;
+ }
+
+ //
------------------------------------------------------------------------
+ // Produce
+ //
------------------------------------------------------------------------
+
+ public void add(Buffer buffer, int targetQueue) throws IOException {
+ checkInProducePhase();
+
+ queues[targetQueue].add(buffer);
+
+ maybeNotifyConsumers(partitionType.isPipelined());
+ }
+
+ public void addToAllPartitions(Buffer buffer) throws IOException {
+ checkInProducePhase();
+
+ for (IntermediateResultPartitionQueue queue : queues) {
+ queue.add(buffer);
+ }
+
+ maybeNotifyConsumers(partitionType.isPipelined());
+ }
+
+ public void finish() throws IOException {
+ checkInProducePhase();
+
+ boolean success = false;
+
+ try {
+ for (IntermediateResultPartitionQueue queue : queues) {
+ queue.finish();
+ }
+
+ success = true;
+ }
+ finally {
+ if (success) {
+ // Notify at this point in any case either
because of the end
+ // of a blocking result or an empty pipelined
result.
+ maybeNotifyConsumers(true);
+ }
+
+ if (!partitionType.isPersistent() && bufferPool !=
null) {
+ // If this partition is not persistent,
immediately destroy
+ // the buffer pool. For persistent intermediate
results, the
+ // partition manager needs to release the
buffer pool.
+ bufferPool.destroy();
+ }
+
+ isFinished = true;
+ }
+ }
+
+ public void releaseAllResources() throws IOException {
+ if (!isReleased) {
+ try {
+ if (bufferPool != null) {
+ bufferPool.destroy();
+ }
+ }
+ finally {
+ isReleased = true;
+ }
+ }
+ }
+
+ //
------------------------------------------------------------------------
+ // Consume
+ //
------------------------------------------------------------------------
+
+ public IntermediateResultPartitionQueueIterator getQueueIterator(int
queueIndex, Optional<BufferProvider> bufferProvider) throws IOException {
+ if (queueIndex < 0 || queueIndex >= queues.length) {
+ throw new IllegalQueueIteratorRequestException();
+ }
+
+ return queues[queueIndex].getQueueIterator(bufferProvider);
+ }
+
+ //
------------------------------------------------------------------------
+
+ @Override
+ public String toString() {
+ return "Intermediate result partition " + partitionId + " [num
queues: " + queues.length + ", " + (isFinished ? "finished" : "not finished") +
"]";
+ }
+
+ private void checkInProducePhase() {
+ checkState(!isReleased, "Partition has already been
discarded.");
+ checkState(!isFinished, "Partition has already been finished.");
+ }
+
+ /**
+ * Maybe notifies consumers of this result partition.
+ */
+ private void maybeNotifyConsumers(boolean doNotify) throws IOException {
+ if (doNotify && !hasNotifiedConsumers) {
+ scheduleOrUpdateConsumers();
+ hasNotifiedConsumers = true;
+ }
+ }
+
+ private void scheduleOrUpdateConsumers() throws IOException {
+ while (true) {
+ ConsumerNotificationResult result =
notificationProtocol.scheduleOrUpdateConsumers(jobId, executionId,
partitionIndex);
+
+ if (result.isSuccess()) {
+ return;
+ }
+ else {
+ Throwable error = result.getError();
+ if (error != null) {
+ throw new
IOException(error.getMessage());
+ }
+ }
+
+ try {
+ Thread.sleep(100);
--- End diff --
Haha ;-)
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