| /** |
| * 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.tracing; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.net.unix.TemporarySocketDirectory; |
| import org.apache.htrace.core.Tracer; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.File; |
| import java.io.PrintStream; |
| |
| public class TestTraceAdmin { |
| private static final String NEWLINE = System.getProperty("line.separator"); |
| |
| private String runTraceCommand(TraceAdmin trace, String... cmd) |
| throws Exception { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| PrintStream ps = new PrintStream(baos); |
| PrintStream oldStdout = System.out; |
| PrintStream oldStderr = System.err; |
| System.setOut(ps); |
| System.setErr(ps); |
| int ret = -1; |
| try { |
| ret = trace.run(cmd); |
| } finally { |
| System.out.flush(); |
| System.setOut(oldStdout); |
| System.setErr(oldStderr); |
| } |
| return "ret:" + ret + ", " + baos.toString(); |
| } |
| |
| private String getHostPortForNN(MiniDFSCluster cluster) { |
| return "127.0.0.1:" + cluster.getNameNodePort(); |
| } |
| |
| @Test |
| public void testCreateAndDestroySpanReceiver() throws Exception { |
| Configuration conf = new Configuration(); |
| conf = new Configuration(); |
| conf.set(TraceUtils.DEFAULT_HADOOP_PREFIX + |
| Tracer.SPAN_RECEIVER_CLASSES_KEY, ""); |
| MiniDFSCluster cluster = |
| new MiniDFSCluster.Builder(conf).numDataNodes(3).build(); |
| cluster.waitActive(); |
| TemporarySocketDirectory tempDir = new TemporarySocketDirectory(); |
| String tracePath = |
| new File(tempDir.getDir(), "tracefile").getAbsolutePath(); |
| try { |
| TraceAdmin trace = new TraceAdmin(); |
| trace.setConf(conf); |
| Assert.assertEquals("ret:0, [no span receivers found]" + NEWLINE, |
| runTraceCommand(trace, "-list", "-host", getHostPortForNN(cluster))); |
| Assert.assertEquals("ret:0, Added trace span receiver 1 with " + |
| "configuration hadoop.htrace.local.file.span.receiver.path = " + tracePath + NEWLINE, |
| runTraceCommand(trace, "-add", "-host", getHostPortForNN(cluster), |
| "-class", "org.apache.htrace.core.LocalFileSpanReceiver", |
| "-Chadoop.htrace.local.file.span.receiver.path=" + tracePath)); |
| String list = |
| runTraceCommand(trace, "-list", "-host", getHostPortForNN(cluster)); |
| Assert.assertTrue(list.startsWith("ret:0")); |
| Assert.assertTrue(list.contains("1 org.apache.htrace.core.LocalFileSpanReceiver")); |
| Assert.assertEquals("ret:0, Removed trace span receiver 1" + NEWLINE, |
| runTraceCommand(trace, "-remove", "1", "-host", |
| getHostPortForNN(cluster))); |
| Assert.assertEquals("ret:0, [no span receivers found]" + NEWLINE, |
| runTraceCommand(trace, "-list", "-host", getHostPortForNN(cluster))); |
| Assert.assertEquals("ret:0, Added trace span receiver 2 with " + |
| "configuration hadoop.htrace.local.file.span.receiver.path = " + tracePath + NEWLINE, |
| runTraceCommand(trace, "-add", "-host", getHostPortForNN(cluster), |
| "-class", "LocalFileSpanReceiver", |
| "-Chadoop.htrace.local.file.span.receiver.path=" + tracePath)); |
| Assert.assertEquals("ret:0, Removed trace span receiver 2" + NEWLINE, |
| runTraceCommand(trace, "-remove", "2", "-host", |
| getHostPortForNN(cluster))); |
| } finally { |
| cluster.shutdown(); |
| tempDir.close(); |
| } |
| } |
| } |