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/* |
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* This file is part of SingleInstance. |
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* |
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* SingleInstance is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* SingleInstance is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with SingleInstance. If not, see <https://www.gnu.org/licenses/>. |
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* |
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* Copyright (c) 2020 Vincent Quatrevieux |
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*/ |
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package fr.quatrevieux.singleinstance.ipc; |
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import java.io.Closeable; |
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import java.io.IOException; |
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import java.io.OutputStream; |
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import java.net.Socket; |
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/** |
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* IPC client for sending actions to the distant instance |
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* |
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* Usage: |
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* <pre>{@code |
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* try (InstanceClient client = new InstanceClient(1234)) { |
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* client.send("Hello", "my payload".getBytes()); |
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* } |
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* }</pre> |
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*/ |
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final public class InstanceClient implements Closeable, MessageSender { |
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final private int port; |
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private Socket socket; |
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private OutputStream output; |
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/** |
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* @param port The listening port |
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*/ |
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public InstanceClient(int port) { |
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this.port = port; |
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} |
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/** |
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* Open the client |
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* Note: this method is implicitly called on {@link InstanceClient#send(Message)} |
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* |
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* @throws IOException When cannot open the socket |
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*/ |
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public void open() throws IOException { |
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socket = new Socket("localhost", port); |
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output = socket.getOutputStream(); |
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} |
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@Override |
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public void send(Message message) throws IOException { |
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1 |
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if (socket == null || socket.isClosed()) { |
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open(); |
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} |
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output.write(ProtocolParser.toBytes(message)); |
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} |
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@Override |
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public void close() throws IOException { |
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if (socket != null) { |
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output.close(); |
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output = null; |
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socket.close(); |
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socket = null; |
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} |
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} |
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} |
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vincent4vx /
SingleInstance
