Mercurial > hg > jdk9-shenandoah > langtools
view src/jdk.compiler/share/classes/com/sun/tools/sjavac/server/RequestHandler.java @ 3022:5ba1a29a0eb0
8129114: Sjavac should stream back compiler output to the client as soon as it becomes available
Summary: Protocol revised, javac output sent back to client slightly earlier.
Reviewed-by: jlahoda
author | alundblad |
---|---|
date | Fri, 04 Sep 2015 13:24:15 +0200 |
parents | adba44f6b471 |
children |
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/* * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.tools.sjavac.server; import static com.sun.tools.sjavac.server.SjavacServer.LINE_TYPE_RC; import static com.sun.tools.sjavac.server.SjavacServer.LINE_TYPE_STDERR; import static com.sun.tools.sjavac.server.SjavacServer.LINE_TYPE_STDOUT; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.PrintWriter; import java.io.StringWriter; import java.io.Writer; import java.net.Socket; import com.sun.tools.sjavac.AutoFlushWriter; import com.sun.tools.sjavac.Log; /** * A RequestHandler handles requests performed over a socket. Specifically it * - Reads the command string specifying which method is to be invoked * - Reads the appropriate arguments * - Delegates the actual invocation to the given sjavac implementation * - Writes the result back to the socket output stream * * None of the work performed by this class is really bound by the CPU. It * should be completely fine to have a large number of RequestHandlers active. * To limit the number of concurrent compilations, use PooledSjavac. * * <p><b>This is NOT part of any supported API. * If you write code that depends on this, you do so at your own risk. * This code and its internal interfaces are subject to change or * deletion without notice.</b> */ public class RequestHandler implements Runnable { private final Socket socket; private final Sjavac sjavac; public RequestHandler(Socket socket, Sjavac sjavac) { this.socket = socket; this.sjavac = sjavac; } @Override public void run() { try (BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream())); PrintWriter out = new PrintWriter(socket.getOutputStream(), true)) { // Read argument array int n = Integer.parseInt(in.readLine()); String[] args = new String[n]; for (int i = 0; i < n; i++) { args[i] = in.readLine(); } // Perform compilation Writer stdout = new LinePrefixFilterWriter(new AutoFlushWriter(out), LINE_TYPE_STDOUT + ":"); Writer stderr = new LinePrefixFilterWriter(new AutoFlushWriter(out), LINE_TYPE_STDERR + ":"); int rc = sjavac.compile(args, stdout, stderr); stdout.flush(); stderr.flush(); // Send return code back to client out.println(LINE_TYPE_RC + ":" + rc); } catch (Exception ex) { // Not much to be done at this point. The client side request // code will most likely throw an IOException and the // compilation will fail. StringWriter sw = new StringWriter(); ex.printStackTrace(new PrintWriter(sw)); Log.error(sw.toString()); } } }