/*
 * Copyright 2014-2020 Real Logic Limited.
 *
 * 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
 *
 * https://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 org.agrona.concurrent;

import org.agrona.ErrorHandler;
import org.agrona.concurrent.status.AtomicCounter;

import java.util.Objects;

/**
 * An {@link ErrorHandler} which calls {@link AtomicCounter#increment()} before delegating the exception.
 */
public class CountedErrorHandler implements ErrorHandler
{
    private final ErrorHandler errorHandler;
    private final AtomicCounter errorCounter;

    /**
     * Construct a counted error handler with a delegate and counter.
     *
     * @param errorHandler to delegate to.
     * @param errorCounter to increment before delegation.
     */
    public CountedErrorHandler(final ErrorHandler errorHandler, final AtomicCounter errorCounter)
    {
        Objects.requireNonNull(errorHandler, "errorHandler");
        Objects.requireNonNull(errorCounter, "errorCounter");

        this.errorHandler = errorHandler;
        this.errorCounter = errorCounter;
    }

    public void onError(final Throwable throwable)
    {
        if (!errorCounter.isClosed())
        {
            errorCounter.increment();
        }

        errorHandler.onError(throwable);
    }
}

@@ -911,16 +911,31 @@
 rHandler
+, AutoCloseable
 %0A%7B%0A    p
@@ -1019,16 +1019,55 @@
 Counter;
+%0A    private volatile boolean isClosed;
 %0A%0A    /*
@@ -1583,61 +1583,356 @@
     
-public void onError(final Throwable throwable)%0A    %7B%0A
+/**%0A     * Close so that %7B@link #onError(Throwable)%7D will not delegate and instead print to %7B@link System#err%7D%0A     */%0A    public void close()%0A    %7B%0A        isClosed = true;%0A    %7D%0A%0A    public void onError(final Throwable throwable)%0A    %7B%0A        if (isClosed)%0A        %7B%0A            throwable.printStackTrace();%0A        %7D%0A        else%0A        %7B%0A    
     
@@ -1965,34 +1965,40 @@
 osed())%0A        
-%7B%0A
+    %7B%0A  
             erro
@@ -1989,24 +1989,26 @@
             
+  
 errorCounter
@@ -2025,27 +2025,35 @@
 ();%0A        
-%7D%0A%0A
+    %7D%0A%0A    
         erro
@@ -2081,16 +2081,26 @@
 wable);%0A
+        %7D%0A
     %7D%0A%7D%0A

Add the ability to close a CountedErrorHandler.