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view agent/ipc/windows-named-pipes/common/src/main/java/com/redhat/thermostat/agent/ipc/winpipes/common/internal/WinPipe.java @ 2589:a6ba41a449c8
[PATCH] Windows Named Pipes - preliminary implementation
A preliminary implementation of windows named pipes.
Does not set windoes named pipes as default IPC; remains TCP
reviewed-by: aazores, ebaron
review-thread: http://icedtea.classpath.org/pipermail/thermostat/2017-February/022126.html
author | Simon Tooke <stooke@redhat.com> |
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date | Fri, 10 Feb 2017 15:52:51 -0500 |
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/* * Copyright 2012-2017 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.agent.ipc.winpipes.common.internal; import java.io.IOException; import java.nio.ByteBuffer; /** * WinPipe performs basic operations (mostly serverside) on a Windows named pipe. */ public class WinPipe { private final WinPipesNativeHelper helper; public static class Id { private final String id; Id(final String id) { this.id = id; } String getPipePath() { return id; } public String toString() { return "pipeid:" + id; } } private final Id pipeid; private long handle; public WinPipe(String pipeName) { this.pipeid = new Id(pipeName); this.helper = WinPipesNativeHelper.INSTANCE; this.handle = WinPipesNativeHelper.INVALID_HANDLE; } WinPipe(Id id) { this.pipeid = id; this.helper = WinPipesNativeHelper.INSTANCE; this.handle = WinPipesNativeHelper.INVALID_HANDLE; } // for testing public WinPipe(WinPipesNativeHelper helper, String pipeName) { this.pipeid = new Id(pipeName); this.helper = helper; this.handle = WinPipesNativeHelper.INVALID_HANDLE; } public WinPipe(WinPipesNativeHelper helper, Id id) { this.pipeid = id; this.helper = helper; this.handle = WinPipesNativeHelper.INVALID_HANDLE; } long open() throws IOException { handle = helper.openNamedPipe(pipeid.getPipePath()); if (!isOpen()) { throw new IOException("Can't open pipe " + getPipeName() + " err=" + helper.getLastError()); } return isOpen() ? handle : WinPipesNativeHelper.INVALID_HANDLE; } public long createWindowsNamedPipe(int numInstances, int bufsize) { handle = helper.createNamedPipe(pipeid.getPipePath(), numInstances, bufsize); return isOpen() ? handle : WinPipesNativeHelper.INVALID_HANDLE; } public void close() { helper.closeHandle(handle); handle = WinPipesNativeHelper.INVALID_HANDLE; } public boolean isOpen() { return handle != WinPipesNativeHelper.INVALID_HANDLE; } public String getPipeName() { return pipeid.getPipePath(); } public String toString() { return "winpipe:" + pipeid; } int write(ByteBuffer buffer) { return helper.writeFile(handle, buffer); } int read(ByteBuffer buffer) { return helper.readFile(handle, buffer); } }