From b1c8641a63a67e3c64d948f9e8dce5c01e11e2dd Mon Sep 17 00:00:00 2001
From: mcentner <mcentner@8a26b1a7-26f0-462f-b9ef-d0e30c41f5a4>
Date: Wed, 5 May 2010 15:29:01 +0000
Subject: Merged feature branch mocca-1.2.13-id@r724 back to trunk.

git-svn-id: https://joinup.ec.europa.eu/svn/mocca/trunk@725 8a26b1a7-26f0-462f-b9ef-d0e30c41f5a4
---
 .../java/at/gv/egiz/mocca/id/SLCommandBrocker.java | 100 +++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 BKUOnline/src/main/java/at/gv/egiz/mocca/id/SLCommandBrocker.java

(limited to 'BKUOnline/src/main/java/at/gv/egiz/mocca/id/SLCommandBrocker.java')

diff --git a/BKUOnline/src/main/java/at/gv/egiz/mocca/id/SLCommandBrocker.java b/BKUOnline/src/main/java/at/gv/egiz/mocca/id/SLCommandBrocker.java
new file mode 100644
index 00000000..2e46a220
--- /dev/null
+++ b/BKUOnline/src/main/java/at/gv/egiz/mocca/id/SLCommandBrocker.java
@@ -0,0 +1,100 @@
+/*
+* Copyright 2009 Federal Chancellery Austria and
+* Graz University of Technology
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+package at.gv.egiz.mocca.id;
+
+import at.gv.egiz.bku.slcommands.SLCommand;
+import at.gv.egiz.bku.slcommands.SLCommandContext;
+import at.gv.egiz.bku.slcommands.SLResult;
+import at.gv.egiz.bku.slcommands.impl.ErrorResultImpl;
+import at.gv.egiz.bku.slexceptions.SLCommandException;
+
+public class SLCommandBrocker {
+  
+  private Sync<SLCommand> commandSync = new Sync<SLCommand>();
+  
+  private Sync<SLResult> resultSync = new Sync<SLResult>();
+
+  public SLResult execute(SLCommand command, SLCommandContext context, long timeout) throws InterruptedException {
+    try {
+      commandSync.put(command, timeout);
+      if (command != null) {
+        return resultSync.get(timeout);
+      } else {
+        return null;
+      }
+    } catch (SLCommandException e) {
+      return new ErrorResultImpl(e, context.getLocale());
+    }
+  }
+  
+  public SLCommand nextCommand(SLResult result, long timeout) throws SLCommandException, InterruptedException {
+    if (result != null) {
+      resultSync.put(result, timeout);
+    }
+    return commandSync.get(timeout);
+  }
+  
+  public class Sync<R> {
+    
+    private boolean available;
+    
+    private R r;
+    
+    public synchronized R get(long timeout) throws SLCommandException, InterruptedException {
+      
+      long t0 = System.currentTimeMillis();
+      long elapsed = 0;
+
+      while (!available) {
+        wait(timeout - elapsed);
+        elapsed = System.currentTimeMillis() - t0;
+        if (elapsed > timeout) {
+          notifyAll();
+          throw new SLCommandException(6000);
+        }
+      }
+
+      R r = this.r;
+      this.r = null;
+      available = false;
+      notifyAll();
+      return r;
+    }
+    
+    public synchronized void put(R r, long timeout) throws SLCommandException, InterruptedException {
+      
+      long t0 = System.currentTimeMillis();
+      long elapsed = 0;
+
+      while (available) {
+        wait(timeout - elapsed);
+        elapsed = System.currentTimeMillis() - t0;
+        if (elapsed > timeout) {
+          notifyAll();
+          throw new SLCommandException(6000);
+        }
+      }
+      
+      this.r = r;
+      available = true;
+      notifyAll();
+    }
+    
+  }
+  
+}
-- 
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