--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/share/classes/com/sun/tools/sjavac/server/RequestHandler.java	Wed Aug 13 14:44:59 2014 +0200
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2014, 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.File;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.net.Socket;
+import java.net.URI;
+import java.util.List;
+import java.util.Set;
+
+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 (ObjectOutputStream oout = new ObjectOutputStream(socket.getOutputStream());
+             ObjectInputStream oin = new ObjectInputStream(socket.getInputStream())) {
+            String id = (String) oin.readObject();
+            String cmd = (String) oin.readObject();
+            Log.info("Handling request, id: " + id + " cmd: " + cmd);
+            switch (cmd) {
+            case SjavacServer.CMD_SYS_INFO: handleSysInfoRequest(oin, oout); break;
+            case SjavacServer.CMD_COMPILE:  handleCompileRequest(oin, oout); break;
+            default: Log.error("Unknown command: " + cmd);
+            }
+        } 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());
+        }
+    }
+
+    private void handleSysInfoRequest(ObjectInputStream oin,
+                                      ObjectOutputStream oout) throws IOException {
+        oout.writeObject(sjavac.getSysInfo());
+        oout.flush();
+    }
+
+    @SuppressWarnings("unchecked")
+    private void handleCompileRequest(ObjectInputStream oin,
+                                      ObjectOutputStream oout) throws IOException {
+        try {
+            // Read request arguments
+            String protocolId = (String) oin.readObject();
+            String invocationId = (String) oin.readObject();
+            String[] args = (String[]) oin.readObject();
+            List<File> explicitSources = (List<File>) oin.readObject();
+            Set<URI> sourcesToCompile = (Set<URI>) oin.readObject();
+            Set<URI> visibleSources = (Set<URI>) oin.readObject();
+
+            // Perform compilation
+            CompilationResult cr = sjavac.compile(protocolId,
+                                                  invocationId,
+                                                  args,
+                                                  explicitSources,
+                                                  sourcesToCompile,
+                                                  visibleSources);
+            // Write request response
+            oout.writeObject(cr);
+            oout.flush();
+        } catch (ClassNotFoundException cnfe) {
+            throw new IOException(cnfe);
+        }
+    }
+}