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+/*******************************************************************************
+ * ============LICENSE_START====================================================
+ * * org.onap.aai
+ * * ===========================================================================
+ * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * * Copyright © 2017 Amdocs
+ * * ===========================================================================
+ * * 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 com.att.inno.env;
+
+/**
+ * <h1>TimeTaken</h1>
+ * This simple interface allows for many different kinds of
+ * Audit Logs to be accomplished, by assuming that the creation
+ * of this object indicates "start", and the calling of "done"
+ * ends.
+ *
+ * The implementor of this class can easily be stored in efficient
+ * mechanisms to minimize impact of Auditing on performance.
+ *
+ *
+ */
+public abstract class TimeTaken {
+ public final long start;
+ protected long end, size;
+ public final int flag;
+ public final String name;
+
+ /**
+ * The name is as it will appear when written to output (abstract method)
+ *
+ * The flag is an integer which can be System type (XML, REMOTE, etc), or End User defined for reporting purposes
+ *
+ * @param name
+ * @param flag
+ */
+ public TimeTaken(String name, int flag) {
+ start = System.nanoTime();
+ this.flag = flag;
+ this.name = name;
+ size = -1;
+ }
+
+
+ /**
+ * Call this when process is done to state ending time.<p>
+ *
+ * It is <i>exceedingly prudent</i> to wrap the process called with a try-finally:<p>
+ *
+ * <pre>
+ * TimeTaken tt = env.startSubTime();
+ * try {
+ * process.me(); // code to be timed.
+ * } finally {
+ * tt.done();
+ * }
+ * </pre>
+ */
+ public void done() {
+ end = System.nanoTime();
+ }
+
+
+ /**
+ * For sizable contents, set the size. Implementations can simply write a no-op if they don't wish to
+ * store the size.
+ *
+ * @param size
+ */
+ public void size(long theSize) {
+ size = theSize;
+ }
+
+ /**
+ * Give readonly access to End, which isn't final
+ * @return
+ */
+ public long end() {
+ return end;
+ }
+
+ /**
+ * Time is taken in NanoSeconds. This method converts to decimals of Milliseconds
+ * @return
+ */
+ public float millis() {
+ return (end-start)/1000000f;
+ }
+ /**
+ * Write self to a String Builder (for making Audits)
+ * @param sb
+ */
+ public abstract void output(StringBuilder sb);
+
+ /**
+ * For Debugging
+ */
+ public String toString() {
+ return name + ' ' + millis() + "ms " + (size>0?Long.toString(size):"");
+ }
+
+}