/
SpannerApiFutures.java
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/
SpannerApiFutures.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.ApiFuture;
import com.google.common.base.Preconditions;
import java.util.concurrent.CancellationException;
import java.util.concurrent.ExecutionException;
public class SpannerApiFutures {
public static <T> T get(ApiFuture<T> future) throws SpannerException {
return getOrNull(Preconditions.checkNotNull(future));
}
public static <T> T getOrNull(ApiFuture<T> future) throws SpannerException {
try {
return future == null ? null : future.get();
} catch (ExecutionException e) {
if (e.getCause() instanceof SpannerException) {
throw (SpannerException) e.getCause();
}
throw SpannerExceptionFactory.newSpannerException(e.getCause());
} catch (InterruptedException e) {
throw SpannerExceptionFactory.propagateInterrupt(e);
} catch (CancellationException e) {
throw SpannerExceptionFactory.newSpannerExceptionForCancellation(null, e);
}
}
}