Initial code check in continued

src/controller/ThreadPoolManager.java

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+/*******************************************************************************
+ *     SDR Trunk 
+ *     Copyright (C) 2014 Dennis Sheirer
+ * 
+ *     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 controller;
+
+import java.util.HashMap;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+
+public class ThreadPoolManager
+{
+	private int THREAD_POOL_SIZE = 10;
+	private int MAX_TASK_COUNT = 24;
+
+	private HashMap<ScheduledFuture<?>,ThreadType> mTasks = 
+				new HashMap<ScheduledFuture<?>,ThreadType>();
+	
+	private ScheduledExecutorService mExecutor;
+	
+	public ThreadPoolManager()
+	{
+	}
+
+	public ScheduledFuture<?> schedule( ThreadType type, 
+										Runnable command, 
+										long period, 
+										TimeUnit unit )
+										throws RejectedExecutionException
+	{
+		if( mExecutor == null )
+		{
+			mExecutor = Executors.newScheduledThreadPool( THREAD_POOL_SIZE );
+		}
+
+		if( mTasks.size() <= MAX_TASK_COUNT )
+		{
+			ScheduledFuture<?> task = 
+					mExecutor.scheduleAtFixedRate( command, 0, period, unit );
+			
+			mTasks.put( task, type );
+			
+			return task;
+		}
+		else
+		{
+			throw new RejectedExecutionException( "Cannot schedule task - at "
+					+ "max task count [" + mTasks.size() + "]" );
+		}
+		
+	}
+	
+	public void cancel( ScheduledFuture<?> task )
+	{
+		task.cancel( true );
+		
+		ThreadType type = mTasks.remove( task );
+	}
+	
+	public int getTaskCount( ThreadType type )
+	{
+		int count = 0;
+		
+		for( ThreadType current: mTasks.values() )
+		{
+			if( current == type )
+			{
+				count++;
+			}
+		}
+		
+		return count;
+	}
+
+	public enum ThreadType
+	{
+		SOURCE_SAMPLE_PROCESSING,
+		DECIMATION,
+		DECODER;
+	}
+}