Made gclc-swt and -system compatible with gclc-1.3.1

Added an abstract runnable for output forwarding from piped output

Signed-off-by: Emmanuel Bigeon <emmanuel@bigeon.fr>

gclc/src/main/java/fr/bigeon/gclc/manager/ConsoleManager.java

@@ -95,6 +95,11 @@ public interface ConsoleManager {
     boolean isClosed();
 
     /** Indicate to the manager that is should interrompt the prompting, if
-     * possible. */
+     * possible.
+     * <p>
+     * The pending {@link #prompt()} or {@link #prompt(String)} operations
+     * should return immediatly. However the returned value can be anything
+     * (from the partial prompt content to an empty string or even a null
+     * pointer). */
     void interruptPrompt();
 }

gclc/src/main/java/fr/bigeon/gclc/tools/AOutputForwardRunnable.java

@@ -0,0 +1,96 @@
+/**
+ * gclc:fr.bigeon.gclc.tools.AOutputForwardRunnable.java
+ * Created on: Dec 1, 2016
+ */
+package fr.bigeon.gclc.tools;
+
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import fr.bigeon.gclc.manager.PipedConsoleManager;
+
+/** An incomplete implematation used to forward messages from a piped console.
+ * <p>
+ * This forwarding can be interrupted without closing the piped manager.
+ *
+ * @author Emmanuel Bigeon */
+public abstract class AOutputForwardRunnable implements Runnable {
+
+    /** The class logger */
+    private static final Logger LOGGER = Logger
+            .getLogger(AOutputForwardRunnable.class.getName());
+    /** The default timeout (one tenth of second). */
+    private static final long DEFAULT_TIMEOUT = 100;
+    /** The manager. */
+    private final PipedConsoleManager manager;
+    /** The timeout */
+    private final long timeout;
+
+    /** Create a forward runnable with the given timeout.
+     * <p>
+     * Short timeout will be very responsive to the application actual messages,
+     * but may use computation time if the application is not verbose. Long
+     * timeout will save computation time, but will read batches of messages at
+     * once if the application is verbose. The right length for the timeout is
+     * likely to depend on the application and the use of it.
+     * <p>
+     * If you do not know what timeout length to use, please use the
+     * {@link #AOutputForwardRunnable(PipedConsoleManager)} constructor.
+     * 
+     * @param manager the manager
+     * @param timeout the timeout between message requests. */
+    public AOutputForwardRunnable(PipedConsoleManager manager, long timeout) {
+        super();
+        this.manager = manager;
+        this.timeout = timeout;
+    }
+
+    /** Create a forwarding runnable.
+     * 
+     * @param manager the manager */
+    public AOutputForwardRunnable(PipedConsoleManager manager) {
+        super();
+        this.manager = manager;
+        timeout = DEFAULT_TIMEOUT;
+    }
+
+    @Override
+    public void run() {
+        try {
+            while (isRunning()) {
+                while (isRunning() && !manager.available()) {
+                    waitASec();
+                }
+                if (!isRunning()) {
+                    return;
+                }
+                String m = manager.readNextLine();
+                forwardLine(m);
+            }
+        } catch (IOException e) {
+            LOGGER.log(Level.SEVERE, "Unexpected problem in manager", //$NON-NLS-1$
+                    e);
+        }
+    }
+
+    /** @param m the line to forward */
+    protected abstract void forwardLine(String m);
+
+    /** @return if the thread should keep running */
+    protected abstract boolean isRunning();
+
+    /** a method to wait some time */
+    protected void waitASec() {
+        try {
+            synchronized (this) {
+                wait(timeout);
+            }
+        } catch (InterruptedException e) {
+            LOGGER.log(Level.SEVERE, "Interrupted wait", //$NON-NLS-1$
+                    e);
+            return;
+        }
+    }
+
+}