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Cassandra support for Spring Data
/*
* Copyright 2016-2022 the original author or authors.
*
* 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
*
* 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.
*/
package org.springframework.data.cassandra.core.cql;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import org.springframework.dao.DataAccessException;
import org.springframework.dao.support.PersistenceExceptionTranslator;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.concurrent.FailureCallback;
import org.springframework.util.concurrent.ListenableFuture;
import org.springframework.util.concurrent.ListenableFutureCallback;
import org.springframework.util.concurrent.SettableListenableFuture;
import org.springframework.util.concurrent.SuccessCallback;
/**
* Adapter class to {@link ListenableFuture} {@link ExecutionException} by applying a
* {@link PersistenceExceptionTranslator}.
*
* @author Mark Paluch
* @since 2.0
*/
class ExceptionTranslatingListenableFutureAdapter implements ListenableFuture {
private final ListenableFuture adaptee;
private final ListenableFuture future;
/**
* Create a new {@link ExceptionTranslatingListenableFutureAdapter} given a {@link ListenableFuture} and a
* {@link PersistenceExceptionTranslator}.
*
* @param adaptee must not be {@literal null}.
* @param persistenceExceptionTranslator must not be {@literal null}.
*/
ExceptionTranslatingListenableFutureAdapter(ListenableFuture adaptee,
PersistenceExceptionTranslator persistenceExceptionTranslator) {
Assert.notNull(adaptee, "ListenableFuture must not be null");
Assert.notNull(persistenceExceptionTranslator, "PersistenceExceptionTranslator must not be null");
this.adaptee = adaptee;
this.future = adaptListenableFuture(adaptee, persistenceExceptionTranslator);
}
private static ListenableFuture adaptListenableFuture(ListenableFuture listenableFuture,
PersistenceExceptionTranslator exceptionTranslator) {
SettableListenableFuture settableFuture = new SettableListenableFuture<>();
listenableFuture.addCallback(new ListenableFutureCallback() {
@Override
public void onSuccess(@Nullable T result) {
settableFuture.set(result);
}
@Override
public void onFailure(Throwable ex) {
if (ex instanceof RuntimeException) {
DataAccessException dataAccessException = exceptionTranslator
.translateExceptionIfPossible((RuntimeException) ex);
if (dataAccessException != null) {
settableFuture.setException(dataAccessException);
return;
}
}
settableFuture.setException(ex);
}
});
return settableFuture;
}
@Override
public void addCallback(ListenableFutureCallback callback) {
future.addCallback(callback);
}
@Override
public void addCallback(SuccessCallback successCallback, FailureCallback failureCallback) {
future.addCallback(successCallback, failureCallback);
}
@Override
public boolean cancel(boolean mayInterruptIfRunning) {
return adaptee.cancel(mayInterruptIfRunning);
}
@Override
public boolean isCancelled() {
return adaptee.isCancelled();
}
@Override
public boolean isDone() {
return future.isDone();
}
@Override
public T get() throws InterruptedException, ExecutionException {
return future.get();
}
@Override
public T get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
return future.get(timeout, unit);
}
}