| /* |
| * 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.knox.gateway.hdfs.dispatch; |
| |
| import org.apache.knox.gateway.ha.provider.HaDescriptor; |
| import org.apache.knox.gateway.ha.provider.HaProvider; |
| import org.apache.knox.gateway.ha.provider.HaServletContextListener; |
| import org.apache.knox.gateway.ha.provider.impl.DefaultHaProvider; |
| import org.apache.knox.gateway.ha.provider.impl.HaDescriptorFactory; |
| import org.apache.knox.gateway.servlet.SynchronousServletOutputStreamAdapter; |
| import org.apache.http.client.methods.HttpRequestBase; |
| import org.apache.http.client.methods.HttpUriRequest; |
| import org.apache.http.impl.client.CloseableHttpClient; |
| import org.apache.http.impl.client.HttpClientBuilder; |
| import org.apache.http.params.BasicHttpParams; |
| import org.easymock.EasyMock; |
| import org.easymock.IAnswer; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import javax.servlet.FilterConfig; |
| import javax.servlet.ServletContext; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import java.io.IOException; |
| import java.net.URI; |
| import java.util.ArrayList; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| public class WebHdfsHaDispatchTest { |
| |
| @Test |
| public void testConnectivityFailover() throws Exception { |
| String serviceName = "WEBHDFS"; |
| HaDescriptor descriptor = HaDescriptorFactory.createDescriptor(); |
| descriptor.addServiceConfig(HaDescriptorFactory.createServiceConfig(serviceName, "true", "1", "1000", "2", "1000", null, null)); |
| HaProvider provider = new DefaultHaProvider(descriptor); |
| URI uri1 = new URI( "http://unreachable-host.invalid" ); |
| URI uri2 = new URI( "http://reachable-host.invalid" ); |
| ArrayList<String> urlList = new ArrayList<>(); |
| urlList.add(uri1.toString()); |
| urlList.add(uri2.toString()); |
| provider.addHaService(serviceName, urlList); |
| FilterConfig filterConfig = EasyMock.createNiceMock(FilterConfig.class); |
| ServletContext servletContext = EasyMock.createNiceMock(ServletContext.class); |
| |
| EasyMock.expect(filterConfig.getServletContext()).andReturn(servletContext).anyTimes(); |
| EasyMock.expect(servletContext.getAttribute(HaServletContextListener.PROVIDER_ATTRIBUTE_NAME)).andReturn(provider).anyTimes(); |
| |
| BasicHttpParams params = new BasicHttpParams(); |
| |
| HttpUriRequest outboundRequest = EasyMock.createNiceMock(HttpRequestBase.class); |
| EasyMock.expect(outboundRequest.getMethod()).andReturn( "GET" ).anyTimes(); |
| EasyMock.expect(outboundRequest.getURI()).andReturn( uri1 ).anyTimes(); |
| EasyMock.expect(outboundRequest.getParams()).andReturn( params ).anyTimes(); |
| |
| HttpServletRequest inboundRequest = EasyMock.createNiceMock(HttpServletRequest.class); |
| EasyMock.expect(inboundRequest.getRequestURL()).andReturn( new StringBuffer(uri2.toString()) ).once(); |
| EasyMock.expect(inboundRequest.getAttribute("dispatch.ha.failover.counter")).andReturn(new AtomicInteger(0)).once(); |
| EasyMock.expect(inboundRequest.getAttribute("dispatch.ha.failover.counter")).andReturn(new AtomicInteger(1)).once(); |
| |
| HttpServletResponse outboundResponse = EasyMock.createNiceMock(HttpServletResponse.class); |
| EasyMock.expect(outboundResponse.getOutputStream()).andAnswer( new IAnswer<SynchronousServletOutputStreamAdapter>() { |
| @Override |
| public SynchronousServletOutputStreamAdapter answer() throws Throwable { |
| return new SynchronousServletOutputStreamAdapter() { |
| @Override |
| public void write( int b ) throws IOException { |
| throw new IOException( "unreachable-host.invalid" ); |
| } |
| }; |
| } |
| }).once(); |
| EasyMock.replay(filterConfig, servletContext, outboundRequest, inboundRequest, outboundResponse); |
| Assert.assertEquals(uri1.toString(), provider.getActiveURL(serviceName)); |
| AbstractHdfsHaDispatch dispatch = new WebHdfsHaDispatch(); |
| HttpClientBuilder builder = HttpClientBuilder.create(); |
| CloseableHttpClient client = builder.build(); |
| dispatch.setHttpClient(client); |
| dispatch.setHaProvider(provider); |
| dispatch.init(); |
| long startTime = System.currentTimeMillis(); |
| try { |
| dispatch.executeRequest(outboundRequest, inboundRequest, outboundResponse); |
| } catch (IOException e) { |
| //this is expected after the failover limit is reached |
| } |
| long elapsedTime = System.currentTimeMillis() - startTime; |
| Assert.assertEquals(uri2.toString(), provider.getActiveURL(serviceName)); |
| //test to make sure the sleep took place |
| Assert.assertTrue(elapsedTime > 1000); |
| } |
| } |