Java tutorial
package com.linkedin.databus.bootstrap.common; /* * * Copyright 2013 LinkedIn Corp. All rights reserved * * Licensed 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. * */ import java.io.FileInputStream; import java.io.IOException; import java.util.Properties; import org.apache.commons.cli.CommandLine; import org.apache.commons.cli.CommandLineParser; import org.apache.commons.cli.GnuParser; import org.apache.commons.cli.Option; import org.apache.commons.cli.OptionBuilder; import org.apache.commons.cli.Options; import org.apache.commons.cli.ParseException; import org.apache.log4j.Logger; import com.linkedin.databus.client.DatabusHttpClientImpl; import com.linkedin.databus.client.DatabusHttpClientImpl.CheckpointPersistenceStaticConfig.ProviderType; import com.linkedin.databus2.core.BackoffTimerStaticConfigBuilder; import com.linkedin.databus2.core.container.netty.ServerContainer; public class BootstrapConfigBase { public static final String MODULE = BootstrapConfig.class.getName(); public static final Logger LOG = Logger.getLogger(MODULE); public static final String BOOTSTRAP_DB_PROPS_OPT_LONG_NAME = "bootstrap_db_props"; public static final char BOOTSTRAP_DB_PROP_OPT_CHAR = 'p'; public static final int DEFAULT_BOOTSTRAP_HTTP_PORT = 6060; public static final String DEFAULT_BOOTSTRAP_DB_USERNAME = "bootstrap"; public static final String DEFAULT_BOOTSTRAP_DB_PASSWORD = "bootstrap"; public static final String DEFAULT_BOOTSTRAP_DB_HOSTNAME = "localhost"; public static final String DEFAULT_BOOTSTRAP_DB_NAME = "bootstrap"; public static final long DEFAULT_BOOTSTRAP_FETCH_SIZE = 1000; public static final int DEFAULT_BOOTSTRAP_LOG_SIZE = 10000; public static final boolean DEFAULT_BOOTSTRAP_DB_STATE_CHECK = false; protected String _bootstrapDBUsername = DEFAULT_BOOTSTRAP_DB_USERNAME; protected String _bootstrapDBPassword = DEFAULT_BOOTSTRAP_DB_PASSWORD; protected String _bootstrapDBHostname = DEFAULT_BOOTSTRAP_DB_HOSTNAME; protected String _bootstrapDBName = DEFAULT_BOOTSTRAP_DB_NAME; protected long _bootstrapBatchSize = DEFAULT_BOOTSTRAP_FETCH_SIZE; protected long _bootstrapSnapshotBatchSize = 0; protected long _bootstrapCatchupBatchSize = 0; protected int _bootstrapLogSize = DEFAULT_BOOTSTRAP_LOG_SIZE; protected boolean _bootstrapDBStateCheck = DEFAULT_BOOTSTRAP_DB_STATE_CHECK; protected DatabusHttpClientImpl.Config _client; protected ServerContainer.Config _container; protected BackoffTimerStaticConfigBuilder _retryTimer; @SuppressWarnings("static-access") public static Properties loadConfigProperties(String[] args) throws IOException { CommandLineParser cliParser = new GnuParser(); Option dbOption = OptionBuilder.withLongOpt(BOOTSTRAP_DB_PROPS_OPT_LONG_NAME) .withDescription("Bootstrap producer properties to use").hasArg().withArgName("property_file") .create(BOOTSTRAP_DB_PROP_OPT_CHAR); Options options = new Options(); options.addOption(dbOption); CommandLine cmd = null; try { cmd = cliParser.parse(options, args); } catch (ParseException pe) { throw new RuntimeException("BootstrapConfig: failed to parse command-line options.", pe); } Properties props = null; if (cmd.hasOption(BOOTSTRAP_DB_PROP_OPT_CHAR)) { String propFile = cmd.getOptionValue(BOOTSTRAP_DB_PROP_OPT_CHAR); LOG.info("Loading bootstrap DB config from properties file " + propFile); props = new Properties(); FileInputStream f = new FileInputStream(propFile); try { props.load(f); } finally { if (null != f) f.close(); } } else { LOG.info("Using system properties for bootstrap DB config"); } return props; } public BootstrapConfigBase() throws IOException { super(); _client = new DatabusHttpClientImpl.Config(); _container = new ServerContainer.Config(); setBootstrapHttpPort(DEFAULT_BOOTSTRAP_HTTP_PORT); _client.getCheckpointPersistence().setType(ProviderType.FILE_SYSTEM.toString()); _client.getCheckpointPersistence().getFileSystem().setRootDirectory("./bootstrap-checkpoints"); _retryTimer = new BackoffTimerStaticConfigBuilder(); } public String getBootstrapDBUsername() { return _bootstrapDBUsername; } public void setBootstrapDBUsername(String dbUsername) { _bootstrapDBUsername = dbUsername; } public String getBootstrapDBName() { return _bootstrapDBName; } public void setBootstrapDBName(String dbName) { _bootstrapDBName = dbName; } public String getBootstrapDBPassword() { return _bootstrapDBPassword; } public String getBootstrapDBHostname() { return _bootstrapDBHostname; } /** * The HTTP port of the bootstrap producer or server. * * This property is deprecated. Please use {@link #getContainer()}.getHttpPort(). */ @Deprecated public int getBootstrapHttpPort() { return _container.getHttpPort(); } public long getBootstrapBatchSize() { return _bootstrapBatchSize; } /** * * @return bootstrapSnapshotBatchSize : defaults to bootstrapBatchSize if none defined */ public long getBootstrapSnapshotBatchSize() { return _bootstrapSnapshotBatchSize > 0 ? _bootstrapSnapshotBatchSize : _bootstrapBatchSize; } /** * * @return bootstrapCatchupBatchSize : defaults to bootstrapBatchSize if none defined */ public long getBootstrapCatchupBatchSize() { return _bootstrapCatchupBatchSize > 0 ? _bootstrapCatchupBatchSize : _bootstrapBatchSize; } public int getBootstrapLogSize() { return _bootstrapLogSize; } /** * Changes the HTTP port of the bootstrap producer or server. * * This property is deprecated. Please use {@link #getContainer()}.setHttpPort(int). */ @Deprecated public void setBootstrapHttpPort(int bootstrapHttpPort) { getContainer().setHttpPort(bootstrapHttpPort); } public void setBootstrapDBPassword(String bootstrapDBPassword) { _bootstrapDBPassword = bootstrapDBPassword; } public void setBootstrapDBHostname(String bootstrapDBHostname) { _bootstrapDBHostname = bootstrapDBHostname; } public void setBootstrapCatchupBatchSize(long bootstrapBatchSize) { _bootstrapCatchupBatchSize = bootstrapBatchSize; } public void setBootstrapSnapshotBatchSize(long bootstrapBatchSize) { _bootstrapSnapshotBatchSize = bootstrapBatchSize; } public void setBootstrapBatchSize(long bootstrapBatchSize) { _bootstrapBatchSize = bootstrapBatchSize; } public void setBootstrapLogSize(int bootstrapLogSize) { _bootstrapLogSize = bootstrapLogSize; } public void setBootstrapDBStateCheck(boolean bootstrapDBStateCheck) { this._bootstrapDBStateCheck = bootstrapDBStateCheck; } public boolean getBootstrapDBStateCheck() { return _bootstrapDBStateCheck; } public DatabusHttpClientImpl.Config getClient() { return _client; } public void setClient(DatabusHttpClientImpl.Config client) { _client = client; } public ServerContainer.Config getContainer() { return _container; } public void setContainer(ServerContainer.Config container) { _container = container; } public BackoffTimerStaticConfigBuilder getRetryTimer() { return _retryTimer; } public void setRetryTimer(BackoffTimerStaticConfigBuilder retryTimer) { this._retryTimer = retryTimer; } }