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Implemented piggybacking of lookup information
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Daniel Warneke
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Aug 10, 2012
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125 changes: 125 additions & 0 deletions
125
...erver/src/main/java/eu/stratosphere/nephele/taskmanager/bytebuffered/SenderHintEvent.java
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|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| /*********************************************************************************************************************** | ||
| * | ||
| * Copyright (C) 2010 by the Stratosphere project (http:https://stratosphere.eu) | ||
| * | ||
| * 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:https://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. | ||
| * | ||
| **********************************************************************************************************************/ | ||
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| package eu.stratosphere.nephele.taskmanager.bytebuffered; | ||
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| import java.io.DataInput; | ||
| import java.io.DataOutput; | ||
| import java.io.IOException; | ||
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| import eu.stratosphere.nephele.event.task.AbstractEvent; | ||
| import eu.stratosphere.nephele.event.task.EventList; | ||
| import eu.stratosphere.nephele.io.channels.ChannelID; | ||
| import eu.stratosphere.nephele.taskmanager.transferenvelope.TransferEnvelope; | ||
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| public final class SenderHintEvent extends AbstractEvent { | ||
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| /** | ||
| * The sequence number that will be set for transfer envelopes which contain the sender hint event. | ||
| */ | ||
| private static final int SENDER_HINT_SEQUENCE_NUMBER = 0; | ||
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| private final ChannelID source; | ||
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| private final RemoteReceiver remoteReceiver; | ||
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| SenderHintEvent(final ChannelID source, final RemoteReceiver remoteReceiver) { | ||
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| if (source == null) { | ||
| throw new IllegalArgumentException("Argument source must not be null"); | ||
| } | ||
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| if (remoteReceiver == null) { | ||
| throw new IllegalArgumentException("Argument remoteReceiver must not be null"); | ||
| } | ||
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| this.source = source; | ||
| this.remoteReceiver = remoteReceiver; | ||
| } | ||
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| public SenderHintEvent() { | ||
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| this.source = new ChannelID(); | ||
| this.remoteReceiver = new RemoteReceiver(); | ||
| } | ||
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| public ChannelID getSource() { | ||
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| return this.source; | ||
| } | ||
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| public RemoteReceiver getRemoteReceiver() { | ||
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| return this.remoteReceiver; | ||
| } | ||
|
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| /** | ||
| * {@inheritDoc} | ||
| */ | ||
| @Override | ||
| public void write(final DataOutput out) throws IOException { | ||
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| this.source.write(out); | ||
| this.remoteReceiver.write(out); | ||
| } | ||
|
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| /** | ||
| * {@inheritDoc} | ||
| */ | ||
| @Override | ||
| public void read(final DataInput in) throws IOException { | ||
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| this.source.read(in); | ||
| this.remoteReceiver.read(in); | ||
| } | ||
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| public static TransferEnvelope createEnvelopeWithEvent(final TransferEnvelope originalEnvelope, | ||
| final ChannelID source, final RemoteReceiver remoteReceiver) { | ||
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| final TransferEnvelope transferEnvelope = new TransferEnvelope(SENDER_HINT_SEQUENCE_NUMBER, | ||
| originalEnvelope.getJobID(), originalEnvelope.getSource()); | ||
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| final SenderHintEvent senderEvent = new SenderHintEvent(source, remoteReceiver); | ||
| transferEnvelope.addEvent(senderEvent); | ||
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| return transferEnvelope; | ||
| } | ||
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| static boolean isSenderHintEvent(final TransferEnvelope transferEnvelope) { | ||
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| if (transferEnvelope.getSequenceNumber() != SENDER_HINT_SEQUENCE_NUMBER) { | ||
| return false; | ||
| } | ||
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| if (transferEnvelope.getBuffer() != null) { | ||
| return false; | ||
| } | ||
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| final EventList eventList = transferEnvelope.getEventList(); | ||
| if (eventList == null) { | ||
| return false; | ||
| } | ||
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| if (eventList.size() != 1) { | ||
| return false; | ||
| } | ||
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| if (!(eventList.get(0) instanceof SenderHintEvent)) { | ||
| return false; | ||
| } | ||
|
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| return true; | ||
| } | ||
| } |
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