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Entity implementation classes, events, and other core elements

There is a newer version: 0.7.0-M1

package brooklyn.management.internal;

import static com.google.common.base.Preconditions.checkNotNull;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import brooklyn.management.ExecutionManager;
import brooklyn.util.collections.MutableMap;
import brooklyn.util.exceptions.Exceptions;
import brooklyn.util.task.BasicExecutionManager;
import brooklyn.util.task.SingleThreadedScheduler;

public class AsyncCollectionChangeAdapter implements CollectionChangeListener {
	
    protected static final Logger LOG = LoggerFactory.getLogger(AsyncCollectionChangeAdapter.class);

    private final ExecutionManager executor;
    private final CollectionChangeListener delegate;
    
    public AsyncCollectionChangeAdapter(ExecutionManager executor, CollectionChangeListener delegate) {
    	this.executor = checkNotNull(executor, "executor");
        this.delegate = checkNotNull(delegate, "delegate");
        ((BasicExecutionManager) executor).setTaskSchedulerForTag(delegate, SingleThreadedScheduler.class);
    }

    @Override
    public void onItemAdded(final Item item) {
    	executor.submit(MutableMap.of("tag", delegate), new Runnable() {
    		public void run() {
    			try {
    				delegate.onItemAdded(item);
    			} catch (Throwable t) {
    				LOG.warn("Error notifying listener of itemAdded("+item+")", t);
    				Exceptions.propagate(t);
    			}
    		}
    	});
    }
    
    @Override
    public void onItemRemoved(final Item item) {
    	executor.submit(MutableMap.of("tag", delegate), new Runnable() {
    		public void run() {
    			try {
    				delegate.onItemRemoved(item);
    			} catch (Throwable t) {
    				LOG.warn("Error notifying listener of itemAdded("+item+")", t);
    				Exceptions.propagate(t);
    			}
    		}
    	});
    }

    @Override
    public int hashCode() {
        return delegate.hashCode();
    }

    @Override
    public boolean equals(Object other) {
        return (other instanceof AsyncCollectionChangeAdapter) && 
        		delegate.equals(((AsyncCollectionChangeAdapter) other).delegate);
    }
}