org.apache.flink.runtime.rpc.RpcUtils Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.flink.runtime.rpc;
import org.apache.flink.api.common.time.Time;
import org.apache.flink.runtime.concurrent.FutureUtils;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
/**
* Utility functions for Flink's RPC implementation.
*/
public class RpcUtils {
/**
* HACK: Set to 21474835 seconds, Akka's maximum delay (Akka 2.4.20). The value cannot be
* higher or an {@link IllegalArgumentException} will be thrown during an RPC. Check the private
* method {@code checkMaxDelay()} in {@link akka.actor.LightArrayRevolverScheduler}.
*/
public static final Time INF_TIMEOUT = Time.seconds(21474835);
/**
* Extracts all {@link RpcGateway} interfaces implemented by the given clazz.
*
* @param clazz from which to extract the implemented RpcGateway interfaces
* @return A set of all implemented RpcGateway interfaces
*/
public static Set> extractImplementedRpcGateways(Class clazz) {
HashSet> interfaces = new HashSet<>();
while (clazz != null) {
for (Class interfaze : clazz.getInterfaces()) {
if (RpcGateway.class.isAssignableFrom(interfaze)) {
interfaces.add((Class) interfaze);
}
}
clazz = clazz.getSuperclass();
}
return interfaces;
}
/**
* Shuts the given {@link RpcEndpoint} down and awaits its termination.
*
* @param rpcEndpoint to terminate
* @param timeout for this operation
* @throws ExecutionException if a problem occurred
* @throws InterruptedException if the operation has been interrupted
* @throws TimeoutException if a timeout occurred
*/
public static void terminateRpcEndpoint(RpcEndpoint rpcEndpoint, Time timeout) throws ExecutionException, InterruptedException, TimeoutException {
rpcEndpoint.closeAsync().get(timeout.toMilliseconds(), TimeUnit.MILLISECONDS);
}
/**
* Shuts the given rpc service down and waits for its termination.
*
* @param rpcService to shut down
* @param timeout for this operation
* @throws InterruptedException if the operation has been interrupted
* @throws ExecutionException if a problem occurred
* @throws TimeoutException if a timeout occurred
*/
public static void terminateRpcService(RpcService rpcService, Time timeout) throws InterruptedException, ExecutionException, TimeoutException {
rpcService.stopService().get(timeout.toMilliseconds(), TimeUnit.MILLISECONDS);
}
/**
* Shuts the given rpc services down and waits for their termination.
*
* @param rpcServices to shut down
* @param timeout for this operation
* @throws InterruptedException if the operation has been interrupted
* @throws ExecutionException if a problem occurred
* @throws TimeoutException if a timeout occurred
*/
public static void terminateRpcServices(
Time timeout,
RpcService... rpcServices) throws InterruptedException, ExecutionException, TimeoutException {
final Collection> terminationFutures = new ArrayList<>(rpcServices.length);
for (RpcService service : rpcServices) {
if (service != null) {
terminationFutures.add(service.stopService());
}
}
FutureUtils.waitForAll(terminationFutures).get(timeout.toMilliseconds(), TimeUnit.MILLISECONDS);
}
/**
* Returns the hostname onto which the given {@link RpcService} has been bound. If
* the {@link RpcService} has been started in local mode, then the hostname is
* {@code "hostname"}.
*
* @param rpcService to retrieve the hostname for
* @return hostname onto which the given {@link RpcService} has been bound or localhost
*/
public static String getHostname(RpcService rpcService) {
final String rpcServiceAddress = rpcService.getAddress();
return rpcServiceAddress != null && rpcServiceAddress.isEmpty() ? "localhost" : rpcServiceAddress;
}
// We don't want this class to be instantiable
private RpcUtils() {}
}