/** * 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.ratis.server.impl; import org.apache.ratis.RaftTestUtil; import org.apache.ratis.util.CodeInjectionForTesting; import java.util.Arrays; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.atomic.AtomicInteger; /** Inject code to delay particular servers. */ public class DelayLocalExecutionInjection implements CodeInjectionForTesting.Code { private final Map<String, AtomicInteger> delays = new ConcurrentHashMap<>(); public DelayLocalExecutionInjection(String... methods) { for (String method : methods) { CodeInjectionForTesting.put(method, this); } } public void clear() { delays.clear(); } public void setDelayMs(String id, int delayMs) { AtomicInteger d = delays.get(id); if (d == null) { delays.put(id, d = new AtomicInteger()); } d.set(delayMs); } public void removeDelay(String id) { delays.remove(id); } @Override public boolean execute(Object localId, Object remoteId, Object... args) { if (localId == null) { return false; } final String localIdStr = localId.toString(); final AtomicInteger d = delays.get(localIdStr); if (d == null) { return false; } LOG.info("{} delay {} ms, args={}", localIdStr, d.get(), Arrays.toString(args)); try { RaftTestUtil.delay(d::get); } catch (InterruptedException e) { LOG.debug("Interrupted while delaying " + localIdStr); } return true; } @Override public String toString() { return getClass().getSimpleName() + ": delays=" + delays; } }