ServerMain.java revision 3265:b7583d50f67d 
1/*
2 * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.tools.sjavac.server;
27
28import java.io.FileWriter;
29import java.io.FilterOutputStream;
30import java.io.FilterWriter;
31import java.io.IOException;
32import java.io.PrintStream;
33import java.lang.Thread.UncaughtExceptionHandler;
34
35import com.sun.tools.sjavac.Log;
36import com.sun.tools.sjavac.Log.Level;
37import com.sun.tools.sjavac.server.log.LazyInitFileLog;
38import com.sun.tools.sjavac.server.log.LoggingOutputStream;
39
40import static com.sun.tools.sjavac.Log.Level.ERROR;
41import static com.sun.tools.sjavac.Log.Level.INFO;
42
43/**
44 *  <p><b>This is NOT part of any supported API.
45 *  If you write code that depends on this, you do so at your own risk.
46 *  This code and its internal interfaces are subject to change or
47 *  deletion without notice.</b>
48 */
49public class ServerMain {
50
51    // For logging server internal (non request specific) errors.
52    private static LazyInitFileLog errorLog;
53
54    public static int run(String[] args) {
55
56        // Under normal operation, all logging messages generated server-side
57        // are due to compilation requests. These logging messages should
58        // be relayed back to the requesting client rather than written to the
59        // server log. The only messages that should be written to the server
60        // log (in production mode) should be errors,
61        Log.setLogForCurrentThread(errorLog = new LazyInitFileLog("server.log"));
62        Log.setLogLevel(ERROR); // should be set to ERROR.
63
64        // Make sure no exceptions go under the radar
65        Thread.setDefaultUncaughtExceptionHandler((t, e) -> {
66            Log.setLogForCurrentThread(errorLog);
67            Log.error(e);
68        });
69
70        // Inevitably someone will try to print messages using System.{out,err}.
71        // Make sure this output also ends up in the log.
72        System.setOut(new PrintStream(new LoggingOutputStream(System.out, INFO, "[stdout] ")));
73        System.setErr(new PrintStream(new LoggingOutputStream(System.err, ERROR, "[stderr] ")));
74
75        // Any options other than --startserver?
76        if (args.length > 1) {
77            Log.error("When spawning a background server, only a single --startserver argument is allowed.");
78            return 1;
79        }
80
81        int exitCode;
82        try {
83            SjavacServer server = new SjavacServer(args[0]);
84            exitCode = server.startServer();
85        } catch (IOException | InterruptedException ex) {
86            ex.printStackTrace();
87            exitCode = -1;
88        }
89
90        return exitCode;
91    }
92
93    public static LazyInitFileLog getErrorLog() {
94        return errorLog;
95    }
96}
97