/*
 * Copyright (c) 2014, 2016, 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 java.io.FileWriter;
import java.io.FilterOutputStream;
import java.io.FilterWriter;
import java.io.IOException;
import java.io.PrintStream;
import java.lang.Thread.UncaughtExceptionHandler;

import com.sun.tools.javac.main.Main;
import com.sun.tools.javac.main.Main.Result;
import com.sun.tools.sjavac.Log;
import com.sun.tools.sjavac.Log.Level;
import com.sun.tools.sjavac.server.log.LazyInitFileLog;
import com.sun.tools.sjavac.server.log.LoggingOutputStream;

import static com.sun.tools.sjavac.Log.Level.ERROR;
import static com.sun.tools.sjavac.Log.Level.INFO;

 
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.
/**
 *  <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 ServerMain {

    // For logging server internal (non request specific) errors.
    private static LazyInitFileLog errorLog;

    public static int run(String[] args) {

        // Under normal operation, all logging messages generated server-side
        // are due to compilation requests. These logging messages should
        // be relayed back to the requesting client rather than written to the
        // server log. The only messages that should be written to the server
        // log (in production mode) should be errors,
        Log.setLogForCurrentThread(errorLog = new LazyInitFileLog("server.log"));
        Log.setLogLevel(ERROR); // should be set to ERROR.

        // Make sure no exceptions go under the radar
        Thread.setDefaultUncaughtExceptionHandler((t, e) -> {
            Log.setLogForCurrentThread(errorLog);
            Log.error(e);
        });

        // Inevitably someone will try to print messages using System.{out,err}.
        // Make sure this output also ends up in the log.
        System.setOut(new PrintStream(new LoggingOutputStream(System.out, INFO, "[stdout] ")));
        System.setErr(new PrintStream(new LoggingOutputStream(System.err, ERROR, "[stderr] ")));

        // Any options other than --startserver?
        if (args.length > 1) {
            Log.error("When spawning a background server, only a single --startserver argument is allowed.");
            return Result.CMDERR.exitCode;
        }

        int exitCode;
        try {
            SjavacServer server = new SjavacServer(args[0]);
            exitCode = server.startServer();
        } catch (IOException | InterruptedException ex) {
            ex.printStackTrace();
            exitCode = Result.ERROR.exitCode;
        }

        return exitCode;
    }

    public static LazyInitFileLog getErrorLog() {
        return errorLog;
    }
}