| /** |
| * 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.hdfs.server.namenode; |
| |
| import static org.junit.Assert.*; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.net.URL; |
| import java.util.EnumMap; |
| |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.apache.hadoop.hdfs.protocol.HdfsConstants; |
| import org.apache.hadoop.hdfs.util.Holder; |
| import org.apache.hadoop.http.HttpServer; |
| import org.junit.Test; |
| |
| public class TestEditLogFileInputStream { |
| private static final byte[] FAKE_LOG_DATA = TestEditLog.HADOOP20_SOME_EDITS; |
| |
| @Test |
| public void testReadURL() throws Exception { |
| // Start a simple web server which hosts the log data. |
| HttpServer server = new HttpServer("test", "0.0.0.0", 0, true); |
| server.start(); |
| try { |
| server.addServlet("fakeLog", "/fakeLog", FakeLogServlet.class); |
| URL url = new URL("http://localhost:" + server.getPort() + "/fakeLog"); |
| EditLogInputStream elis = EditLogFileInputStream.fromUrl( |
| url, HdfsConstants.INVALID_TXID, HdfsConstants.INVALID_TXID, |
| false); |
| // Read the edit log and verify that we got all of the data. |
| EnumMap<FSEditLogOpCodes, Holder<Integer>> counts = |
| FSImageTestUtil.countEditLogOpTypes(elis); |
| assertEquals(1L, (long)counts.get(FSEditLogOpCodes.OP_ADD).held); |
| assertEquals(1L, (long)counts.get(FSEditLogOpCodes.OP_SET_GENSTAMP).held); |
| assertEquals(1L, (long)counts.get(FSEditLogOpCodes.OP_CLOSE).held); |
| |
| // Check that length header was picked up. |
| assertEquals(FAKE_LOG_DATA.length, elis.length()); |
| elis.close(); |
| } finally { |
| server.stop(); |
| } |
| } |
| |
| @SuppressWarnings("serial") |
| public static class FakeLogServlet extends HttpServlet { |
| @Override |
| public void doGet(HttpServletRequest request, |
| HttpServletResponse response |
| ) throws ServletException, IOException { |
| response.setHeader("Content-Length", |
| String.valueOf(FAKE_LOG_DATA.length)); |
| OutputStream out = response.getOutputStream(); |
| out.write(FAKE_LOG_DATA); |
| out.close(); |
| } |
| } |
| |
| } |