com.datastax.driver.core.DriverThrowables Maven / Gradle / Ivy
/*
* Copyright DataStax, Inc.
*
* 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.datastax.driver.core;
import com.datastax.driver.core.exceptions.DriverException;
import com.datastax.driver.core.exceptions.DriverInternalError;
import java.util.concurrent.ExecutionException;
class DriverThrowables {
static RuntimeException propagateCause(ExecutionException e) {
Throwable cause = e.getCause();
if (cause instanceof Error) throw ((Error) cause);
// We could just rethrow e.getCause(). However, the cause of the ExecutionException has likely
// been
// created on the I/O thread receiving the response. Which means that the stacktrace associated
// with said cause will make no mention of the current thread. This is painful for say, finding
// out which execute() statement actually raised the exception. So instead, we re-create the
// exception.
if (cause instanceof DriverException) throw ((DriverException) cause).copy();
else throw new DriverInternalError("Unexpected exception thrown", cause);
}
}