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/*******************************************************************************
 * ============LICENSE_START====================================================
 * * org.onap.aaf
 * * ===========================================================================
 * * Copyright © 2017 AT&T Intellectual Property. 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.
 * * 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.
 * * ============LICENSE_END====================================================
 * *
 * * ECOMP is a trademark and service mark of AT&T Intellectual Property.
 * *
 ******************************************************************************/
package org.onap.aaf.inno.env;




/**
 * A Trans is like an Env, however, it's purpose it to track the Transient 
 * Data associated with Transactions, or other short term elements.
 * 
 * Any Object implementing Trans should expect to go in an out of scope quickly
 * 
 * Implementations should also overload the concepts of "Start", etc and build up
 * and Audit Log, so it can implement "metric" below
 * 
 * All Transactions (i.e. a call to a service) will need these items.
 * 
 *
 */
public interface Trans extends Env {
	/**
	 * Add a completed entry in the Audit Trail for tracking purposes.
	 * 
	 * @param text
	 */
	public void checkpoint(String text);

	/**
	 * Add a completed entry in the Audit Trail for tracking purposes, and combine flag with "CHECKPOINT" 
	 * 
	 * @param text
	 */
	public void checkpoint(String text, int additionalFlag);

	/**
	 * Output an Audit Trail onto the StringBuilder
	 *
	 * Load metrics into an array of floats from passed in Flags
	 * 
	 * @param flag
	 * @param sb
	 * @return	 
	 */
	public Metric auditTrail(LogTarget lt, int indent, StringBuilder sb, int ... flag);

	public Metric auditTrail(int indent, StringBuilder sb, int ... flag);

	public class Metric {
		public float[] buckets;
		public float   total;
		public int     entries;
	}
}