| /** |
| * 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.hadoop.ha; |
| |
| import java.io.Closeable; |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.util.ArrayList; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.ha.HAServiceProtocol.HAServiceState; |
| import org.apache.hadoop.security.AccessControlException; |
| import org.mockito.Mockito; |
| |
| import com.google.common.collect.Lists; |
| |
| /** |
| * Test-only implementation of {@link HAServiceTarget}, which returns |
| * a mock implementation. |
| */ |
| class DummyHAService extends HAServiceTarget { |
| public static final Log LOG = LogFactory.getLog(DummyHAService.class); |
| private static final String DUMMY_FENCE_KEY = "dummy.fence.key"; |
| volatile HAServiceState state; |
| HAServiceProtocol proxy; |
| ZKFCProtocol zkfcProxy = null; |
| NodeFencer fencer; |
| InetSocketAddress address; |
| boolean isHealthy = true; |
| boolean actUnreachable = false; |
| boolean failToBecomeActive, failToBecomeStandby, failToFence; |
| |
| DummySharedResource sharedResource; |
| public int fenceCount = 0; |
| |
| static ArrayList<DummyHAService> instances = Lists.newArrayList(); |
| int index; |
| |
| DummyHAService(HAServiceState state, InetSocketAddress address) { |
| this.state = state; |
| this.proxy = makeMock(); |
| try { |
| Configuration conf = new Configuration(); |
| conf.set(DUMMY_FENCE_KEY, DummyFencer.class.getName()); |
| this.fencer = Mockito.spy( |
| NodeFencer.create(conf, DUMMY_FENCE_KEY)); |
| } catch (BadFencingConfigurationException e) { |
| throw new RuntimeException(e); |
| } |
| this.address = address; |
| synchronized (instances) { |
| instances.add(this); |
| this.index = instances.size(); |
| } |
| } |
| |
| public void setSharedResource(DummySharedResource rsrc) { |
| this.sharedResource = rsrc; |
| } |
| |
| private HAServiceProtocol makeMock() { |
| return Mockito.spy(new MockHAProtocolImpl()); |
| } |
| |
| @Override |
| public InetSocketAddress getAddress() { |
| return address; |
| } |
| |
| @Override |
| public InetSocketAddress getZKFCAddress() { |
| return null; |
| } |
| |
| @Override |
| public HAServiceProtocol getProxy(Configuration conf, int timeout) |
| throws IOException { |
| return proxy; |
| } |
| |
| @Override |
| public ZKFCProtocol getZKFCProxy(Configuration conf, int timeout) |
| throws IOException { |
| assert zkfcProxy != null; |
| return zkfcProxy; |
| } |
| |
| @Override |
| public NodeFencer getFencer() { |
| return fencer; |
| } |
| |
| @Override |
| public void checkFencingConfigured() throws BadFencingConfigurationException { |
| } |
| |
| @Override |
| public boolean isAutoFailoverEnabled() { |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| return "DummyHAService #" + index; |
| } |
| |
| public static HAServiceTarget getInstance(int serial) { |
| return instances.get(serial - 1); |
| } |
| |
| private class MockHAProtocolImpl implements |
| HAServiceProtocol, Closeable { |
| @Override |
| public void monitorHealth() throws HealthCheckFailedException, |
| AccessControlException, IOException { |
| checkUnreachable(); |
| if (!isHealthy) { |
| throw new HealthCheckFailedException("not healthy"); |
| } |
| } |
| |
| @Override |
| public void transitionToActive(StateChangeRequestInfo req) throws ServiceFailedException, |
| AccessControlException, IOException { |
| checkUnreachable(); |
| if (failToBecomeActive) { |
| throw new ServiceFailedException("injected failure"); |
| } |
| if (sharedResource != null) { |
| sharedResource.take(DummyHAService.this); |
| } |
| state = HAServiceState.ACTIVE; |
| } |
| |
| @Override |
| public void transitionToStandby(StateChangeRequestInfo req) throws ServiceFailedException, |
| AccessControlException, IOException { |
| checkUnreachable(); |
| if (failToBecomeStandby) { |
| throw new ServiceFailedException("injected failure"); |
| } |
| if (sharedResource != null) { |
| sharedResource.release(DummyHAService.this); |
| } |
| state = HAServiceState.STANDBY; |
| } |
| |
| @Override |
| public HAServiceStatus getServiceStatus() throws IOException { |
| checkUnreachable(); |
| HAServiceStatus ret = new HAServiceStatus(state); |
| if (state == HAServiceState.STANDBY) { |
| ret.setReadyToBecomeActive(); |
| } |
| return ret; |
| } |
| |
| private void checkUnreachable() throws IOException { |
| if (actUnreachable) { |
| throw new IOException("Connection refused (fake)"); |
| } |
| } |
| |
| @Override |
| public void close() throws IOException { |
| } |
| } |
| |
| public static class DummyFencer implements FenceMethod { |
| @Override |
| public void checkArgs(String args) throws BadFencingConfigurationException { |
| } |
| |
| @Override |
| public boolean tryFence(HAServiceTarget target, String args) |
| throws BadFencingConfigurationException { |
| LOG.info("tryFence(" + target + ")"); |
| DummyHAService svc = (DummyHAService)target; |
| synchronized (svc) { |
| svc.fenceCount++; |
| } |
| if (svc.failToFence) { |
| LOG.info("Injected failure to fence"); |
| return false; |
| } |
| svc.sharedResource.release(svc); |
| return true; |
| } |
| } |
| |
| } |