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INTERNAL: Creating piped collection operation future.
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src/main/java/net/spy/memcached/internal/PipedCollectionFuture.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| package net.spy.memcached.internal; | ||
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| import net.spy.memcached.MemcachedConnection; | ||
| import net.spy.memcached.ops.CollectionOperationStatus; | ||
| import net.spy.memcached.ops.Operation; | ||
| import net.spy.memcached.ops.OperationState; | ||
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| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Collections; | ||
| import java.util.ArrayList; | ||
| import java.util.Collection; | ||
| import java.util.HashSet; | ||
| import java.util.concurrent.CountDownLatch; | ||
| import java.util.concurrent.ConcurrentLinkedQueue; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.concurrent.TimeoutException; | ||
| import java.util.concurrent.ExecutionException; | ||
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| public class PipedCollectionFuture<K, V> | ||
| extends CollectionFuture<Map<K, V>> { | ||
| private final ConcurrentLinkedQueue<Operation> ops = new ConcurrentLinkedQueue<Operation>(); | ||
| private final List<CollectionOperationStatus> mergedOperationStatus; | ||
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| private final Map<K, V> mergedResult = | ||
| new ConcurrentHashMap<K, V>(); | ||
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| public PipedCollectionFuture(CountDownLatch l, long opTimeout, int opSize) { | ||
| super(l, opTimeout); | ||
| mergedOperationStatus = Collections | ||
| .synchronizedList(new ArrayList<CollectionOperationStatus>(opSize)); | ||
| } | ||
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| @Override | ||
| public boolean cancel(boolean ign) { | ||
| boolean rv = false; | ||
| for (Operation op : ops) { | ||
| op.cancel("by application."); | ||
| rv |= op.getState() == OperationState.WRITE_QUEUED; | ||
| } | ||
| return rv; | ||
| } | ||
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| @Override | ||
| public boolean isCancelled() { | ||
| for (Operation op : ops) { | ||
| if (op.isCancelled()) { | ||
| return true; | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
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| @Override | ||
| public boolean isDone() { | ||
| for (Operation op : ops) { | ||
| if (!(op.getState() == OperationState.COMPLETE || op.isCancelled())) { | ||
| return false; | ||
| } | ||
| } | ||
| return true; | ||
| } | ||
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| @Override | ||
| public Map<K, V> get(long duration, | ||
| TimeUnit units) | ||
| throws InterruptedException, TimeoutException, ExecutionException { | ||
|
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| if (!latch.await(duration, units)) { | ||
| Collection<Operation> timedoutOps = new HashSet<Operation>(); | ||
| for (Operation op : ops) { | ||
| if (op.getState() != OperationState.COMPLETE) { | ||
| timedoutOps.add(op); | ||
| } else { | ||
| MemcachedConnection.opSucceeded(op); | ||
| } | ||
| } | ||
| if (timedoutOps.size() > 0) { | ||
| MemcachedConnection.opTimedOut(timedoutOps.iterator().next()); | ||
| throw new CheckedOperationTimeoutException(duration, units, timedoutOps); | ||
| } | ||
| } else { | ||
| // continuous timeout counter will be reset only once in pipe | ||
| MemcachedConnection.opSucceeded(ops.iterator().next()); | ||
| } | ||
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| for (Operation op : ops) { | ||
| if (op != null && op.hasErrored()) { | ||
| throw new ExecutionException(op.getException()); | ||
| } | ||
|
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| if (op != null && op.isCancelled()) { | ||
| throw new ExecutionException(new RuntimeException(op.getCancelCause())); | ||
| } | ||
| } | ||
|
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| return mergedResult; | ||
| } | ||
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| @Override | ||
| public CollectionOperationStatus getOperationStatus() { | ||
| for (CollectionOperationStatus status : mergedOperationStatus) { | ||
| if (!status.isSuccess()) { | ||
| return status; | ||
| } | ||
| } | ||
| return mergedOperationStatus.get(0); | ||
| } | ||
|
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| public void addOperationStatus(CollectionOperationStatus status) { | ||
| mergedOperationStatus.add(status); | ||
| } | ||
|
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| public void addEachResult(K index, V status) { | ||
| mergedResult.put(index, status); | ||
| } | ||
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| public void addOperation(Operation op) { | ||
| ops.add(op); | ||
| } | ||
| } |