--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/share/classes/com/sun/tools/sjavac/server/JavacServer.java Fri Jan 18 00:16:21 2013 +0100
@@ -0,0 +1,751 @@
+/*
+ * Copyright (c) 2011-2012, 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.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+import java.io.FileNotFoundException;
+import java.net.URI;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.HashMap;
+import java.util.Map;
+
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.net.SocketAddress;
+import java.util.ArrayList;
+import java.util.Random;
+
+import com.sun.tools.sjavac.Util;
+import com.sun.tools.sjavac.ProblemException;
+import java.io.*;
+import java.util.*;
+
+/**
+ * The JavacServer class contains methods both to setup a server that responds to requests and methods to connect to this server.
+ *
+ * <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></p>
+ */
+public class JavacServer {
+ // Responding to this tcp/ip port on localhost.
+
+ private final ServerSocket serverSocket;
+ // The secret cookie shared between server and client through the port file.
+ private final long myCookie;
+ // When the server was started.
+ private long serverStart;
+ // Accumulated build time for all requests, not counting idle time.
+ private long totalBuildTime;
+ // The javac server specific log file.
+ PrintWriter theLog;
+ // The compiler pool that maintains the compiler threads.
+ CompilerPool compilerPool;
+ // For the client, all port files fetched, one per started javac server.
+ // Though usually only one javac server is started by a client.
+ private static Map<String, PortFile> allPortFiles;
+ private static Map<String, Long> maxServerMemory;
+ final static int ERROR_FATAL = -1;
+ final static int ERROR_BUT_TRY_AGAIN = -4712;
+ final static String PROTOCOL_COOKIE_VERSION = "----THE-COOKIE-V2----";
+ final static String PROTOCOL_CWD = "----THE-CWD----";
+ final static String PROTOCOL_ID = "----THE-ID----";
+ final static String PROTOCOL_ARGS = "----THE-ARGS----";
+ final static String PROTOCOL_SOURCES_TO_COMPILE = "----THE-SOURCES-TO-COMPILE----";
+ final static String PROTOCOL_VISIBLE_SOURCES = "----THE-VISIBLE-SOURCES----";
+ final static String PROTOCOL_END = "----THE-END----";
+ final static String PROTOCOL_STDOUT = "----THE-STDOUT----";
+ final static String PROTOCOL_STDERR = "----THE-STDERR----";
+ final static String PROTOCOL_PACKAGE_ARTIFACTS = "----THE-PACKAGE_ARTIFACTS----";
+ final static String PROTOCOL_PACKAGE_DEPENDENCIES = "----THE-PACKAGE_DEPENDENCIES----";
+ final static String PROTOCOL_PACKAGE_PUBLIC_APIS = "----THE-PACKAGE-PUBLIC-APIS----";
+ final static String PROTOCOL_SYSINFO = "----THE-SYSINFO----";
+ final static String PROTOCOL_RETURN_CODE = "----THE-RETURN-CODE----";
+ // Check if the portfile is gone, every 5 seconds.
+ static int CHECK_PORTFILE_INTERVAL = 5;
+ // Wait 2 seconds for response, before giving up on javac server.
+ static int CONNECTION_TIMEOUT = 2;
+ static int WAIT_BETWEEN_CONNECT_ATTEMPTS = 1;
+ static int MAX_NUM_CONNECT_ATTEMPTS = 3;
+
+ /**
+ * Acquire the port file. Synchronized since several threads inside an smart javac wrapper client acquires the same port file at the same time.
+ */
+ private static synchronized PortFile getPortFile(String filename) throws FileNotFoundException {
+ if (allPortFiles == null) {
+ allPortFiles = new HashMap<String, PortFile>();
+ }
+ PortFile pf = allPortFiles.get(filename);
+ if (pf == null) {
+ pf = new PortFile(filename);
+ allPortFiles.put(filename, pf);
+ }
+ return pf;
+ }
+
+ /**
+ * Get the cookie used for this server.
+ */
+ long getCookie() {
+ return myCookie;
+ }
+
+ /**
+ * Get the port used for this server.
+ */
+ int getPort() {
+ return serverSocket.getLocalPort();
+ }
+
+ /**
+ * Sum up the total build time for this javac server.
+ */
+ public void addBuildTime(long inc) {
+ totalBuildTime += inc;
+ }
+
+ /**
+ * Log this message.
+ */
+ public void log(String msg) {
+ if (theLog != null) {
+ theLog.println(msg);
+ } else {
+ System.err.println(msg);
+ }
+ }
+
+ /**
+ * Make sure the log is flushed.
+ */
+ public void flushLog() {
+ if (theLog != null) {
+ theLog.flush();
+ }
+ }
+
+ /**
+ * Start a server using a settings string. Typically: "--startserver:portfile=/tmp/myserver,poolsize=3" and the string "portfile=/tmp/myserver,poolsize=3"
+ * is sent as the settings parameter. Returns 0 on success, -1 on failure.
+ */
+ public static int startServer(String settings, PrintStream err) {
+ try {
+ String portfile = Util.extractStringOption("portfile", settings);
+ // The log file collects more javac server specific log information.
+ String logfile = Util.extractStringOption("logfile", settings);
+ // The stdouterr file collects all the System.out and System.err writes to disk.
+ String stdouterrfile = Util.extractStringOption("stdouterrfile", settings);
+ // We could perhaps use System.setOut and setErr here.
+ // But for the moment we rely on the client to spawn a shell where stdout
+ // and stderr are redirected already.
+ // The pool size is a limit the number of concurrent compiler threads used.
+ // The server might use less than these to avoid memory problems.
+ int poolsize = Util.extractIntOption("poolsize", settings);
+ if (poolsize <= 0) {
+ // If not set, default to the number of cores.
+ poolsize = Runtime.getRuntime().availableProcessors();
+ }
+
+ // How many seconds of inactivity will the server accept before quitting?
+ int keepalive = Util.extractIntOption("keepalive", settings);
+ if (keepalive <= 0) {
+ keepalive = 120;
+ }
+ // The port file is locked and the server port and cookie is written into it.
+ PortFile portFile = getPortFile(portfile);
+ JavacServer s;
+
+ synchronized (portFile) {
+ portFile.lock();
+ portFile.getValues();
+ if (portFile.containsPortInfo()) {
+ err.println("Javac server not started because portfile exists!");
+ portFile.unlock();
+ return -1;
+ }
+ s = new JavacServer(poolsize, logfile);
+ portFile.setValues(s.getPort(), s.getCookie());
+ portFile.unlock();
+ }
+
+ // Run the server. Will delete the port file when shutting down.
+ // It will shut down automatically when no new requests have come in
+ // during the last 125 seconds.
+ s.run(portFile, err, keepalive);
+ // The run loop for the server has exited.
+ return 0;
+ } catch (Exception e) {
+ e.printStackTrace(err);
+ return -1;
+ }
+ }
+
+ /**
+ * Dispatch a compilation request to a javac server.
+ *
+ * @param args are the command line args to javac and is allowed to contain source files, @file and other command line options to javac.
+ *
+ * The generated classes, h files and other artifacts from the javac invocation are stored by the javac server to disk.
+ *
+ * @param sources_to_compile The sources to compile.
+ *
+ * @param visibleSources If visible sources has a non zero size, then visible_sources are the only files in the file system that the javac server can see!
+ * (Sources to compile are always visible.) The visible sources are those supplied by the (filtered) -sourcepath
+ *
+ * @param visibleClasses If visible classes for a specific root/jar has a non zero size, then visible_classes are the only class files that the javac server
+ * can see, in that root/jar. It maps from a classpath root or a jar file to the set of visible classes for that root/jar.
+ *
+ * The server return meta data about the build in the following parameters.
+ * @param package_artifacts, map from package name to set of created artifacts for that package.
+ * @param package_dependencies, map from package name to set of packages that it depends upon.
+ * @param package_pubapis, map from package name to unique string identifying its pub api.
+ */
+ public static int useServer(String settings, String[] args,
+ Set<URI> sourcesToCompile,
+ Set<URI> visibleSources,
+ Map<URI, Set<String>> visibleClasses,
+ Map<String, Set<URI>> packageArtifacts,
+ Map<String, Set<String>> packageDependencies,
+ Map<String, String> packagePubapis,
+ SysInfo sysinfo,
+ PrintStream out,
+ PrintStream err) {
+ try {
+ // The id can perhaps be used in the future by the javac server to reuse the
+ // JavaCompiler instance for several compiles using the same id.
+ String id = Util.extractStringOption("id", settings);
+ String portfile = Util.extractStringOption("portfile", settings);
+ String logfile = Util.extractStringOption("logfile", settings);
+ String stdouterrfile = Util.extractStringOption("stdouterrfile", settings);
+ String background = Util.extractStringOption("background", settings);
+ if (background == null || !background.equals("false")) {
+ background = "true";
+ }
+ // The sjavac option specifies how the server part of sjavac is spawned.
+ // If you have the experimental sjavac in your path, you are done. If not, you have
+ // to point to a com.sun.tools.sjavac.Main that supports --startserver
+ // for example by setting: sjavac=java%20-jar%20...javac.jar%com.sun.tools.sjavac.Main
+ String sjavac = Util.extractStringOption("sjavac", settings);
+ int poolsize = Util.extractIntOption("poolsize", settings);
+ int keepalive = Util.extractIntOption("keepalive", settings);
+
+ if (keepalive <= 0) {
+ // Default keepalive for server is 120 seconds.
+ // I.e. it will accept 120 seconds of inactivity before quitting.
+ keepalive = 120;
+ }
+ if (portfile == null) {
+ err.println("No portfile was specified!");
+ return -1;
+ }
+ if (logfile == null) {
+ logfile = portfile + ".javaclog";
+ }
+ if (stdouterrfile == null) {
+ stdouterrfile = portfile + ".stdouterr";
+ }
+ // Default to sjavac and hope it is in the path.
+ if (sjavac == null) {
+ sjavac = "sjavac";
+ }
+
+ int attempts = 0;
+ int rc = -1;
+ do {
+ PortFile port_file = getPortFile(portfile);
+ synchronized (port_file) {
+ port_file.lock();
+ port_file.getValues();
+ port_file.unlock();
+ }
+ if (!port_file.containsPortInfo()) {
+ String cmd = fork(sjavac, port_file.getFilename(), logfile, poolsize, keepalive, err, stdouterrfile, background);
+
+ if (background.equals("true") && !port_file.waitForValidValues()) {
+ // Ouch the server did not start! Lets print its stdouterrfile and the command used.
+ printFailedAttempt(cmd, stdouterrfile, err);
+ // And give up.
+ return -1;
+ }
+ }
+ rc = connectAndCompile(port_file, id, args, sourcesToCompile, visibleSources,
+ packageArtifacts, packageDependencies, packagePubapis, sysinfo,
+ out, err);
+ // Try again until we manage to connect. Any error after that
+ // will cause the compilation to fail.
+ if (rc == ERROR_BUT_TRY_AGAIN) {
+ // We could not connect to the server. Try again.
+ attempts++;
+ try {
+ Thread.sleep(WAIT_BETWEEN_CONNECT_ATTEMPTS);
+ } catch (InterruptedException e) {
+ }
+ }
+ } while (rc == ERROR_BUT_TRY_AGAIN && attempts < MAX_NUM_CONNECT_ATTEMPTS);
+ return rc;
+ } catch (Exception e) {
+ e.printStackTrace(err);
+ return -1;
+ }
+ }
+
+ private static void printFailedAttempt(String cmd, String f, PrintStream err) {
+ err.println("---- Failed to start javac server with this command -----");
+ err.println(cmd);
+ try {
+ BufferedReader in = new BufferedReader(new FileReader(f));
+ err.println("---- stdout/stderr output from attempt to start javac server -----");
+ for (;;) {
+ String l = in.readLine();
+ if (l == null) {
+ break;
+ }
+ err.println(l);
+ }
+ err.println("------------------------------------------------------------------");
+ } catch (Exception e) {
+ err.println("The stdout/stderr output in file " + f + " does not exist and the server did not start.");
+ }
+ }
+
+ /**
+ * Spawn the server instance.
+ */
+
+ private JavacServer(int poolSize, String logfile) throws IOException {
+ serverStart = System.currentTimeMillis();
+ // Create a server socket on a random port that is bound to the localhost/127.0.0.1 interface.
+ // I.e only local processes can connect to this port.
+ serverSocket = new ServerSocket(0, 128, InetAddress.getByName(null));
+ compilerPool = new CompilerPool(poolSize, this);
+ Random rnd = new Random();
+ myCookie = rnd.nextLong();
+ theLog = new PrintWriter(logfile);
+ log("Javac server started. port=" + getPort() + " date=" + (new java.util.Date()) + " with poolsize=" + poolSize);
+ flushLog();
+ }
+
+ /**
+ * Fork a background process. Returns the command line used that can be printed if something failed.
+ */
+ private static String fork(String sjavac, String portfile, String logfile, int poolsize, int keepalive,
+ final PrintStream err, String stdouterrfile, String background)
+ throws IOException, ProblemException {
+ if (stdouterrfile != null && stdouterrfile.trim().equals("")) {
+ stdouterrfile = null;
+ }
+ final String startserver = "--startserver:portfile=" + portfile + ",logfile=" + logfile + ",stdouterrfile=" + stdouterrfile + ",poolsize=" + poolsize + ",keepalive="+ keepalive;
+
+ if (background.equals("true")) {
+ sjavac += "%20" + startserver;
+ sjavac = sjavac.replaceAll("%20", " ");
+ sjavac = sjavac.replaceAll("%2C", ",");
+ // If the java/sh/cmd launcher fails the failure will be captured by stdouterr because of the redirection here.
+ String[] cmd = {"/bin/sh", "-c", sjavac + " >> " + stdouterrfile + " 2>&1"};
+ if (!(new File("/bin/sh")).canExecute()) {
+ ArrayList<String> wincmd = new ArrayList<String>();
+ wincmd.add("cmd");
+ wincmd.add("/c");
+ wincmd.add("start");
+ wincmd.add("cmd");
+ wincmd.add("/c");
+ wincmd.add(sjavac + " >> " + stdouterrfile + " 2>&1");
+ cmd = wincmd.toArray(new String[wincmd.size()]);
+ }
+ Process pp = null;
+ try {
+ pp = Runtime.getRuntime().exec(cmd);
+ } catch (Exception e) {
+ e.printStackTrace(err);
+ e.printStackTrace(new PrintWriter(stdouterrfile));
+ }
+ StringBuilder rs = new StringBuilder();
+ for (String s : cmd) {
+ rs.append(s + " ");
+ }
+ return rs.toString();
+ }
+
+ // Do not spawn a background server, instead run it within the same JVM.
+ Thread t = new Thread() {
+ @Override
+ public void run() {
+ try {
+ JavacServer.startServer(startserver, err);
+ } catch (Throwable t) {
+ t.printStackTrace(err);
+ }
+ }
+ };
+ t.start();
+ return "";
+ }
+
+ /**
+ * Expect this key on the next line read from the reader.
+ */
+ private static boolean expect(BufferedReader in, String key) throws IOException {
+ String s = in.readLine();
+ if (s != null && s.equals(key)) {
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * Make a request to the server only to get the maximum possible heap size to use for compilations.
+ *
+ * @param port_file The port file used to synchronize creation of this server.
+ * @param id The identify of the compilation.
+ * @param out Standard out information.
+ * @param err Standard err information.
+ * @return The maximum heap size in bytes.
+ */
+ public static SysInfo connectGetSysInfo(String serverSettings, PrintStream out, PrintStream err) {
+ SysInfo sysinfo = new SysInfo(-1, -1);
+ String id = Util.extractStringOption("id", serverSettings);
+ String portfile = Util.extractStringOption("portfile", serverSettings);
+ try {
+ PortFile pf = getPortFile(portfile);
+ useServer(serverSettings, new String[0],
+ new HashSet<URI>(),
+ new HashSet<URI>(),
+ new HashMap<URI, Set<String>>(),
+ new HashMap<String, Set<URI>>(),
+ new HashMap<String, Set<String>>(),
+ new HashMap<String, String>(),
+ sysinfo, out, err);
+ } catch (Exception e) {
+ e.printStackTrace(err);
+ }
+ return sysinfo;
+ }
+
+ /**
+ * Connect and compile using the javac server settings and the args. When using more advanced features, the sources_to_compile and visible_sources are
+ * supplied to the server and meta data is returned in package_artifacts, package_dependencies and package_pubapis.
+ */
+ private static int connectAndCompile(PortFile portFile, String id, String[] args,
+ Set<URI> sourcesToCompile,
+ Set<URI> visibleSources,
+ Map<String, Set<URI>> packageArtifacts,
+ Map<String, Set<String>> packageDependencies,
+ Map<String, String> packagePublicApis,
+ SysInfo sysinfo,
+ PrintStream out,
+ PrintStream err) {
+ int rc = -3;
+ try {
+ int port = portFile.getPort();
+ if (port == 0) {
+ return ERROR_BUT_TRY_AGAIN;
+ }
+ long cookie = portFile.getCookie();
+
+ // Acquire the localhost/127.0.0.1 address.
+ InetAddress addr = InetAddress.getByName(null);
+ SocketAddress sockaddr = new InetSocketAddress(addr, port);
+ Socket sock = new Socket();
+ int timeoutMs = CONNECTION_TIMEOUT * 1000;
+ try {
+ sock.connect(sockaddr, timeoutMs);
+ } catch (java.net.ConnectException e) {
+ err.println("Could not connect to javac server found in portfile: " + portFile.getFilename() + " " + e);
+ return ERROR_BUT_TRY_AGAIN;
+ }
+ if (!sock.isConnected()) {
+ err.println("Could not connect to javac server found in portfile: " + portFile.getFilename());
+ return ERROR_BUT_TRY_AGAIN;
+ }
+ BufferedReader in = new BufferedReader(new InputStreamReader(sock.getInputStream()));
+ PrintWriter sockout = new PrintWriter(sock.getOutputStream());
+
+ sockout.println(PROTOCOL_COOKIE_VERSION);
+ sockout.println("" + cookie);
+ sockout.println(PROTOCOL_CWD);
+ sockout.println(System.getProperty("user.dir"));
+ sockout.println(PROTOCOL_ID);
+ sockout.println(id);
+ sockout.println(PROTOCOL_ARGS);
+ for (String s : args) {
+ StringBuffer buf = new StringBuffer();
+ String[] paths = s.split(File.pathSeparator);
+ int c = 0;
+ for (String path : paths) {
+ File f = new File(path);
+ if (f.isFile() || f.isDirectory()) {
+ buf.append(f.getAbsolutePath());
+ c++;
+ if (c < paths.length) {
+ buf.append(File.pathSeparator);
+ }
+ } else {
+ buf = new StringBuffer(s);
+ break;
+ }
+ }
+ sockout.println(buf.toString());
+ }
+ sockout.println(PROTOCOL_SOURCES_TO_COMPILE);
+ for (URI uri : sourcesToCompile) {
+ sockout.println(uri.toString());
+ }
+ sockout.println(PROTOCOL_VISIBLE_SOURCES);
+ for (URI uri : visibleSources) {
+ sockout.println(uri.toString());
+ }
+ sockout.println(PROTOCOL_END);
+ sockout.flush();
+
+ StringBuffer stdout = new StringBuffer();
+ StringBuffer stderr = new StringBuffer();
+
+ if (!expect(in, PROTOCOL_STDOUT)) {
+ return ERROR_FATAL;
+ }
+ // Load stdout
+ for (;;) {
+ String l = in.readLine();
+ if (l == null) {
+ return ERROR_FATAL;
+ }
+ if (l.equals(PROTOCOL_STDERR)) {
+ break;
+ }
+ stdout.append(l);
+ stdout.append('\n');
+ }
+ // Load stderr
+ for (;;) {
+ String l = in.readLine();
+ if (l == null) {
+ return ERROR_FATAL;
+ }
+ if (l.equals(PROTOCOL_PACKAGE_ARTIFACTS)) {
+ break;
+ }
+ stderr.append(l);
+ stderr.append('\n');
+ }
+ // Load the package artifacts
+ Set<URI> lastUriSet = null;
+ for (;;) {
+ String l = in.readLine();
+ if (l == null) {
+ return ERROR_FATAL;
+ }
+ if (l.equals(PROTOCOL_PACKAGE_DEPENDENCIES)) {
+ break;
+ }
+ if (l.length() > 1 && l.charAt(0) == '+') {
+ String pkg = l.substring(1);
+ lastUriSet = new HashSet<URI>();
+ packageArtifacts.put(pkg, lastUriSet);
+ } else if (l.length() > 1 && lastUriSet != null) {
+ lastUriSet.add(new URI(l.substring(1)));
+ }
+ }
+ // Load package dependencies
+ Set<String> lastPackageSet = null;
+ for (;;) {
+ String l = in.readLine();
+ if (l == null) {
+ return ERROR_FATAL;
+ }
+ if (l.equals(PROTOCOL_PACKAGE_PUBLIC_APIS)) {
+ break;
+ }
+ if (l.length() > 1 && l.charAt(0) == '+') {
+ String pkg = l.substring(1);
+ lastPackageSet = new HashSet<String>();
+ packageDependencies.put(pkg, lastPackageSet);
+ } else if (l.length() > 1 && lastPackageSet != null) {
+ lastPackageSet.add(l.substring(1));
+ }
+ }
+ // Load package pubapis
+ Map<String, StringBuffer> tmp = new HashMap<String, StringBuffer>();
+ StringBuffer lastPublicApi = null;
+ for (;;) {
+ String l = in.readLine();
+ if (l == null) {
+ return ERROR_FATAL;
+ }
+ if (l.equals(PROTOCOL_SYSINFO)) {
+ break;
+ }
+ if (l.length() > 1 && l.charAt(0) == '+') {
+ String pkg = l.substring(1);
+ lastPublicApi = new StringBuffer();
+ tmp.put(pkg, lastPublicApi);
+ } else if (l.length() > 1 && lastPublicApi != null) {
+ lastPublicApi.append(l.substring(1));
+ lastPublicApi.append("\n");
+ }
+ }
+ for (String p : tmp.keySet()) {
+ assert (packagePublicApis.get(p) == null);
+ String api = tmp.get(p).toString();
+ packagePublicApis.put(p, api);
+ }
+ // Now reading the max memory possible.
+ for (;;) {
+ String l = in.readLine();
+ if (l == null) {
+ return ERROR_FATAL;
+ }
+ if (l.equals(PROTOCOL_RETURN_CODE)) {
+ break;
+ }
+ if (l.startsWith("num_cores=") && sysinfo != null) {
+ sysinfo.numCores = Integer.parseInt(l.substring(10));
+ }
+ if (l.startsWith("max_memory=") && sysinfo != null) {
+ sysinfo.maxMemory = Long.parseLong(l.substring(11));
+ }
+ }
+ String l = in.readLine();
+ if (l == null) {
+ err.println("No return value from the server!");
+ return ERROR_FATAL;
+ }
+ rc = Integer.parseInt(l);
+ out.print(stdout);
+ err.print(stderr);
+ } catch (Exception e) {
+ e.printStackTrace(err);
+ }
+ return rc;
+ }
+
+ /**
+ * Run the server thread until it exits. Either because of inactivity or because the port file has been deleted by someone else, or overtaken by some other
+ * javac server.
+ */
+ private void run(PortFile portFile, PrintStream err, int keepalive) {
+ boolean fileDeleted = false;
+ long timeSinceLastCompile;
+ try {
+ // Every 5 second (check_portfile_interval) we test if the portfile has disappeared => quit
+ // Or if the last request was finished more than 125 seconds ago => quit
+ // 125 = seconds_of_inactivity_before_shutdown+check_portfile_interval
+ serverSocket.setSoTimeout(CHECK_PORTFILE_INTERVAL*1000);
+ for (;;) {
+ try {
+ Socket s = serverSocket.accept();
+ CompilerThread ct = compilerPool.grabCompilerThread();
+ ct.setSocket(s);
+ compilerPool.execute(ct);
+ flushLog();
+ } catch (java.net.SocketTimeoutException e) {
+ if (compilerPool.numActiveRequests() > 0) {
+ // Never quit while there are active requests!
+ continue;
+ }
+ // If this is the timeout after the portfile
+ // has been deleted by us. Then we truly stop.
+ if (fileDeleted) {
+ log("Quitting because of "+(keepalive+CHECK_PORTFILE_INTERVAL)+" seconds of inactivity!");
+ break;
+ }
+ // Check if the portfile is still there.
+ if (!portFile.exists()) {
+ // Time to quit because the portfile was deleted by another
+ // process, probably by the makefile that is done building.
+ log("Quitting because portfile was deleted!");
+ flushLog();
+ break;
+ }
+ // Check if portfile.stop is still there.
+ if (portFile.markedForStop()) {
+ // Time to quit because another process touched the file
+ // server.port.stop to signal that the server should stop.
+ // This is necessary on some operating systems that lock
+ // the port file hard!
+ log("Quitting because a portfile.stop file was found!");
+ portFile.delete();
+ flushLog();
+ break;
+ }
+ // Does the portfile still point to me?
+ if (!portFile.stillMyValues()) {
+ // Time to quit because another build has started.
+ log("Quitting because portfile is now owned by another javac server!");
+ flushLog();
+ break;
+ }
+
+ // Check how long since the last request finished.
+ long diff = System.currentTimeMillis() - compilerPool.lastRequestFinished();
+ if (diff < keepalive * 1000) {
+ // Do not quit if we have waited less than 120 seconds.
+ continue;
+ }
+ // Ok, time to quit because of inactivity. Perhaps the build
+ // was killed and the portfile not cleaned up properly.
+ portFile.delete();
+ fileDeleted = true;
+ log("" + keepalive + " seconds of inactivity quitting in "
+ + CHECK_PORTFILE_INTERVAL + " seconds!");
+ flushLog();
+ // Now we have a second 5 second grace
+ // period where javac remote requests
+ // that have loaded the data from the
+ // recently deleted portfile can connect
+ // and complete their requests.
+ }
+ }
+ } catch (Exception e) {
+ e.printStackTrace(err);
+ e.printStackTrace(theLog);
+ flushLog();
+ } finally {
+ compilerPool.shutdown();
+ }
+ long realTime = System.currentTimeMillis() - serverStart;
+ log("Shutting down.");
+ log("Total wall clock time " + realTime + "ms build time " + totalBuildTime + "ms");
+ flushLog();
+ }
+
+ public static void cleanup(String... args) {
+ String settings = Util.findServerSettings(args);
+ if (settings == null) return;
+ String portfile = Util.extractStringOption("portfile", settings);
+ String background = Util.extractStringOption("background", settings);
+ if (background != null && background.equals("false")) {
+ // If the server runs within this jvm, then delete the portfile,
+ // since this jvm is about to exit soon.
+ File f = new File(portfile);
+ f.delete();
+ }
+ }
+}