Java tutorial
/* * 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 com.adaltas.flume.serialization; import com.google.common.base.Charsets; import java.io.BufferedReader; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.FileReader; import java.io.IOException; import java.io.OutputStream; import java.util.HashMap; import java.util.Map; import org.apache.commons.io.FileUtils; import org.apache.flume.Context; import org.apache.flume.event.EventBuilder; import org.apache.flume.serialization.EventSerializer; import org.apache.flume.serialization.EventSerializerFactory; import org.junit.Assert; import org.junit.Test; public class TestHeaderAndBodyTextEventSerializer { File testFile = new File("src/test/resources/events.txt"); File expectedFile = new File("src/test/resources/events.txt"); @Test public void testWithNewline() throws FileNotFoundException, IOException { Map<String, String> headers = new HashMap<String, String>(); headers.put("header1", "value1"); headers.put("header2", "value2"); OutputStream out = new FileOutputStream(testFile); EventSerializer serializer = EventSerializerFactory.getInstance( "com.adaltas.flume.serialization.HeaderAndBodyTextEventSerializer$Builder", new Context(), out); serializer.afterCreate(); serializer.write(EventBuilder.withBody("event 1", Charsets.UTF_8, headers)); serializer.write(EventBuilder.withBody("event 2", Charsets.UTF_8, headers)); serializer.write(EventBuilder.withBody("event 3", Charsets.UTF_8, headers)); serializer.flush(); serializer.beforeClose(); out.flush(); out.close(); BufferedReader reader = new BufferedReader(new FileReader(testFile)); Assert.assertEquals("{header2=value2, header1=value1} event 1", reader.readLine()); Assert.assertEquals("{header2=value2, header1=value1} event 2", reader.readLine()); Assert.assertEquals("{header2=value2, header1=value1} event 3", reader.readLine()); Assert.assertNull(reader.readLine()); reader.close(); FileUtils.forceDelete(testFile); } @Test public void testNoNewline() throws FileNotFoundException, IOException { Map<String, String> headers = new HashMap<String, String>(); headers.put("header1", "value1"); headers.put("header2", "value2"); OutputStream out = new FileOutputStream(testFile); Context context = new Context(); context.put("appendNewline", "false"); EventSerializer serializer = EventSerializerFactory.getInstance( "com.adaltas.flume.serialization.HeaderAndBodyTextEventSerializer$Builder", context, out); serializer.afterCreate(); serializer.write(EventBuilder.withBody("event 1\n", Charsets.UTF_8, headers)); serializer.write(EventBuilder.withBody("event 2\n", Charsets.UTF_8, headers)); serializer.write(EventBuilder.withBody("event 3\n", Charsets.UTF_8, headers)); serializer.flush(); serializer.beforeClose(); out.flush(); out.close(); BufferedReader reader = new BufferedReader(new FileReader(testFile)); Assert.assertEquals("{header2=value2, header1=value1} event 1", reader.readLine()); Assert.assertEquals("{header2=value2, header1=value1} event 2", reader.readLine()); Assert.assertEquals("{header2=value2, header1=value1} event 3", reader.readLine()); Assert.assertNull(reader.readLine()); reader.close(); FileUtils.forceDelete(testFile); } @Test public void testCSV() throws FileNotFoundException, IOException { Map<String, String> headers = new HashMap<String, String>(); headers.put("header1", "value1"); headers.put("header2", "value2"); OutputStream out = new FileOutputStream(testFile); Context context = new Context(); context.put("format", "CSV"); EventSerializer serializer = EventSerializerFactory.getInstance( "com.adaltas.flume.serialization.HeaderAndBodyTextEventSerializer$Builder", context, out); serializer.afterCreate(); serializer.write(EventBuilder.withBody("event 1", Charsets.UTF_8, headers)); serializer.write(EventBuilder.withBody("event 2", Charsets.UTF_8, headers)); serializer.write(EventBuilder.withBody("event 3", Charsets.UTF_8, headers)); serializer.flush(); serializer.beforeClose(); out.flush(); out.close(); BufferedReader reader = new BufferedReader(new FileReader(testFile)); Assert.assertEquals("value2,value1,event 1", reader.readLine()); Assert.assertEquals("value2,value1,event 2", reader.readLine()); Assert.assertEquals("value2,value1,event 3", reader.readLine()); Assert.assertNull(reader.readLine()); reader.close(); FileUtils.forceDelete(testFile); } @Test public void testCSVAndColumns() throws FileNotFoundException, IOException { Map<String, String> headers = new HashMap<String, String>(); headers.put("header1", "value1"); headers.put("header2", "value2"); headers.put("header3", "value3"); OutputStream out = new FileOutputStream(testFile); Context context = new Context(); context.put("format", "CSV"); context.put("columns", "header3 header2"); EventSerializer serializer = EventSerializerFactory.getInstance( "com.adaltas.flume.serialization.HeaderAndBodyTextEventSerializer$Builder", context, out); serializer.afterCreate(); serializer.write(EventBuilder.withBody("event 1", Charsets.UTF_8, headers)); serializer.write(EventBuilder.withBody("event 2", Charsets.UTF_8, headers)); serializer.write(EventBuilder.withBody("event 3", Charsets.UTF_8, headers)); serializer.flush(); serializer.beforeClose(); out.flush(); out.close(); BufferedReader reader = new BufferedReader(new FileReader(testFile)); Assert.assertEquals("value3,value2,event 1", reader.readLine()); Assert.assertEquals("value3,value2,event 2", reader.readLine()); Assert.assertEquals("value3,value2,event 3", reader.readLine()); Assert.assertNull(reader.readLine()); reader.close(); FileUtils.forceDelete(testFile); } }