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 org.apache.geode.management.internal.configuration.messages; import java.io.DataInput; import java.io.DataOutput; import java.io.IOException; import java.util.HashSet; import java.util.Set; import org.apache.commons.lang.StringUtils; import org.apache.geode.internal.DataSerializableFixedID; import org.apache.geode.internal.Version; /*** * Request sent by a member to the locator requesting the shared configuration * */ public class ConfigurationRequest implements DataSerializableFixedID { private static int DEFAULT_NUM_ATTEMPTS = 5; private Set<String> groups = new HashSet<>(); private boolean isRequestForEntireConfiguration = false; private int numAttempts = DEFAULT_NUM_ATTEMPTS; public ConfigurationRequest() { super(); } public ConfigurationRequest(Set<String> groups) { this.groups = groups; this.isRequestForEntireConfiguration = false; } public ConfigurationRequest(boolean getEntireConfiguration) { this.isRequestForEntireConfiguration = true; } public void addGroups(String group) { if (StringUtils.isNotBlank(group)) this.groups.add(group); } @Override public int getDSFID() { return DataSerializableFixedID.CONFIGURATION_REQUEST; } @Override public void toData(DataOutput out) throws IOException { out.writeBoolean(isRequestForEntireConfiguration); int size = groups.size(); out.writeInt(size); if (size > 0) { for (String group : groups) { out.writeUTF(group); } } out.writeInt(numAttempts); } @Override public void fromData(DataInput in) throws IOException, ClassNotFoundException { this.isRequestForEntireConfiguration = in.readBoolean(); int size = in.readInt(); Set<String> groups = new HashSet<>(); if (size > 0) { for (int i = 0; i < size; i++) { groups.add(in.readUTF()); } } this.groups = groups; this.numAttempts = in.readInt(); } public Set<String> getGroups() { return this.groups; } public void setGroups(Set<String> groups) { this.groups = groups; } public boolean isRequestForEntireConfiguration() { return this.isRequestForEntireConfiguration; } @Override public String toString() { StringBuffer sb = new StringBuffer(); sb.append("ConfigurationRequest for groups : "); sb.append("\n cluster"); sb.append(this.groups); return sb.toString(); } public Version[] getSerializationVersions() { return null; } public int getNumAttempts() { return numAttempts; } public void setNumAttempts(int numAttempts) { this.numAttempts = numAttempts; } }