forked from googleapis/gax-java
/
AttemptCallable.java
95 lines (84 loc) · 3.72 KB
/
AttemptCallable.java
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/*
* Copyright 2017 Google LLC
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.google.api.gax.rpc;
import com.google.api.core.ApiFuture;
import com.google.api.core.ApiFutures;
import com.google.api.gax.retrying.NonCancellableFuture;
import com.google.api.gax.retrying.RetryingFuture;
import com.google.common.base.Preconditions;
import java.util.concurrent.Callable;
import org.threeten.bp.Duration;
/**
* A callable representing an attempt to make an RPC call. This class is used from {@link
* RetryingCallable}.
*
* <p>Package-private for internal use.
*
* @param <RequestT> request type
* @param <ResponseT> response type
*/
class AttemptCallable<RequestT, ResponseT> implements Callable<ResponseT> {
private final UnaryCallable<RequestT, ResponseT> callable;
private final RequestT request;
private final ApiCallContext originalCallContext;
private volatile RetryingFuture<ResponseT> externalFuture;
AttemptCallable(
UnaryCallable<RequestT, ResponseT> callable, RequestT request, ApiCallContext callContext) {
this.callable = Preconditions.checkNotNull(callable);
this.request = Preconditions.checkNotNull(request);
this.originalCallContext = Preconditions.checkNotNull(callContext);
}
public void setExternalFuture(RetryingFuture<ResponseT> externalFuture) {
this.externalFuture = Preconditions.checkNotNull(externalFuture);
}
@Override
public ResponseT call() {
ApiCallContext callContext = originalCallContext;
try {
// Set the RPC timeout if the caller did not provide their own.
Duration rpcTimeout = externalFuture.getAttemptSettings().getRpcTimeout();
if (!rpcTimeout.isZero() && callContext.getTimeout() == null) {
callContext = callContext.withTimeout(rpcTimeout);
}
externalFuture.setAttemptFuture(new NonCancellableFuture<ResponseT>());
if (externalFuture.isDone()) {
return null;
}
callContext
.getTracer()
.attemptStarted(externalFuture.getAttemptSettings().getOverallAttemptCount());
ApiFuture<ResponseT> internalFuture = callable.futureCall(request, callContext);
externalFuture.setAttemptFuture(internalFuture);
} catch (Throwable e) {
externalFuture.setAttemptFuture(ApiFutures.<ResponseT>immediateFailedFuture(e));
}
return null;
}
}