/
AsyncRunnerImpl.java
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/
AsyncRunnerImpl.java
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/*
* Copyright 2020 Google LLC
*
* 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 com.google.cloud.spanner;
import com.google.api.core.ApiFunction;
import com.google.api.core.ApiFuture;
import com.google.api.core.ApiFutures;
import com.google.api.core.SettableApiFuture;
import com.google.cloud.Timestamp;
import com.google.cloud.spanner.TransactionRunner.TransactionCallable;
import com.google.common.base.Preconditions;
import com.google.common.util.concurrent.MoreExecutors;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executor;
class AsyncRunnerImpl implements AsyncRunner {
private final TransactionRunnerImpl delegate;
private final SettableApiFuture<CommitResponse> commitResponse = SettableApiFuture.create();
AsyncRunnerImpl(TransactionRunnerImpl delegate) {
this.delegate = Preconditions.checkNotNull(delegate);
}
@Override
public <R> ApiFuture<R> runAsync(final AsyncWork<R> work, Executor executor) {
final SettableApiFuture<R> res = SettableApiFuture.create();
executor.execute(
new Runnable() {
@Override
public void run() {
try {
res.set(runTransaction(work));
} catch (Throwable t) {
res.setException(t);
} finally {
setCommitResponse();
}
}
});
return res;
}
private <R> R runTransaction(final AsyncWork<R> work) {
return delegate.run(
new TransactionCallable<R>() {
@Override
public R run(TransactionContext transaction) throws Exception {
try {
return work.doWorkAsync(transaction).get();
} catch (ExecutionException e) {
throw SpannerExceptionFactory.newSpannerException(e.getCause());
} catch (InterruptedException e) {
throw SpannerExceptionFactory.propagateInterrupt(e);
}
}
});
}
private void setCommitResponse() {
try {
commitResponse.set(delegate.getCommitResponse());
} catch (Throwable t) {
commitResponse.setException(t);
}
}
@Override
public ApiFuture<Timestamp> getCommitTimestamp() {
return ApiFutures.transform(
commitResponse,
new ApiFunction<CommitResponse, Timestamp>() {
@Override
public Timestamp apply(CommitResponse input) {
return input.getCommitTimestamp();
}
},
MoreExecutors.directExecutor());
}
public ApiFuture<CommitResponse> getCommitResponse() {
return commitResponse;
}
}