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 /*
  * Copyright 2012-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License").
  * You may not use this file except in compliance with the License.
  * A copy of the License is located at
  *
  *  http://aws.amazon.com/apache2.0
  *
 * or in the "license" file accompanying this file. This file 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 com.amazonaws.services.simpleworkflow.flow.worker;
Thread local store of the context object passed to an activity implementation. Avoid using this class directly. Use com.amazonaws.services.simpleworkflow.flow.ActivityExecutionContextProviderImpl instead.

Author(s):
fateev
    private final static ThreadLocal<ActivityExecutionContextCURRENT = new ThreadLocal<ActivityExecutionContext>();

    
This is used by activity implementation to get access to the current ActivityExecutionContext
    public static ActivityExecutionContext get() {
        ActivityExecutionContext result = .get();
        if (result == null) {
            throw new IllegalStateException("ActivityExecutionContext can be used only inside of acitivty implementation methods");
        }
        return result;
    };
    public static boolean isSet() {
        return .get() != null;
    }
    public static void set(ActivityExecutionContext context) {
        if (context == null) {
            throw new IllegalArgumentException("null context");
        }
        .set(context);
    }
    public static void unset() {
        .set(null);
    }
    private CurrentActivityExecutionContext() {
    }
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