--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main/java/org/icedrobot/ika/runtime/RuntimeCommand.java	Thu Apr 07 20:23:08 2011 +0200
@@ -0,0 +1,144 @@
+/*
+ * IKA - IcedRobot Kiosk Application
+ * Copyright (C) 2011  IcedRobot team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.icedrobot.ika.runtime;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import org.icedrobot.ika.output.DefaultWorkerStatus;
+import org.icedrobot.ika.output.StatusKeeper;
+import org.icedrobot.ika.output.WorkerStatus;
+
+
+/**
+ * Executable command that will report its status to the StatusKeeper.
+ */
+public class RuntimeCommand {
+
+    private final String[] typeSample = new String[0];
+
+
+    private Process proc;
+    protected final String taskName;
+    protected List<String> commandLine;
+
+
+    /**
+     * Initializes a RuntimeCommand
+     * @param name          Command name. No other active commands must exist.
+     * @param commandLine   Command line used to execute the command.
+     */
+    public RuntimeCommand(String name, String... commandLine) {
+        taskName = name;
+        this.commandLine = new LinkedList<String>( Arrays.asList(commandLine) );
+
+        StatusKeeper.getInstance().registerWorker(taskName );
+    }
+
+
+    /**
+     * Processes a line of output provided by the external process.
+     * @param output    Output of the external process
+     * @return          WorkerStatus expressing the same information as output.
+     */
+    protected WorkerStatus process(String output) {
+        return new DefaultWorkerStatus(0f, output);
+    }
+
+    /**
+     * Starts the external process
+     * @param path      Working directory
+     * @return          Newly started process.
+     */
+    protected Process runCommand(File path) {
+        return IkaRuntime.exec( path, commandLine.toArray(typeSample) );
+    }
+
+    /**
+     * Starts the external process
+     * @param path      Working directory
+     */
+    public void execute(File path) {
+        proc = runCommand(path);
+
+        BufferedReader input = new BufferedReader(
+                                    new InputStreamReader(
+                                        proc.getInputStream() ));
+
+        String line;
+        WorkerStatus status;
+
+        try {
+
+            while ((line = input.readLine()) != null) {
+                status = process(line);
+                StatusKeeper.getInstance().reportStatus(taskName, status);
+            }
+
+        } catch (IOException ex) {
+            Logger.getLogger( RuntimeCommand.class.getName() ).log(
+                   Level.SEVERE, taskName + ": error on the input stream", ex );
+        }
+
+        do {
+            try {
+
+                /*
+                 * If the process terminates abnormally, leave its status there
+                 * so that it can be clearly seen.
+                 */
+                if (proc.waitFor() == 0) {
+                    StatusKeeper.getInstance().deregisterWorker(taskName);
+                }
+
+                proc = null;
+
+            } catch (InterruptedException ex) {
+                Logger.getLogger( RuntimeCommand.class.getName() )
+                                    .log( Level.INFO,
+                                        "Thread was interrupted while waiting "
+                                            + "for process termination", ex);
+            }
+
+        } while (proc != null);
+
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder bdr = new StringBuilder(getClass().getSimpleName());
+
+        bdr.append('(');
+
+        for (String s : commandLine) {
+            bdr.append(s);
+            bdr.append(' ');
+        }
+
+        bdr.setCharAt(bdr.length() - 1, ')');
+
+        return bdr.toString();
+    }
+}