1 files changed, 259 insertions, 0 deletions
diff --git a/dblib/provider/src/main/java/org/onap/ccsdk/sli/core/dblib/pm/PollingWorker.java b/dblib/provider/src/main/java/org/onap/ccsdk/sli/core/dblib/pm/PollingWorker.java
new file mode 100644
index 000000000..f66250676
--- /dev/null
+++ b/dblib/provider/src/main/java/org/onap/ccsdk/sli/core/dblib/pm/PollingWorker.java
@@ -0,0 +1,259 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * onap
+ * ================================================================================
+ * Copyright (C) 2016 - 2017 ONAP
+ * ================================================================================
+ * Modifications Copyright (C) 2018 IBM.
+ * ================================================================================
+ * 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=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.dblib.pm;
+
+import java.util.Iterator;
+import java.util.Properties;
+import java.util.Set;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.TreeSet;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.atomic.AtomicLong;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * @version $Revision: 1.15 $
+ * Change Log
+ * Author         Date     Comments
+ * ============== ======== ====================================================
+ * Rich Tabedzki
+ */
+public class PollingWorker implements Runnable {
+
+	private static final Logger LOGGER = LoggerFactory.getLogger(PollingWorker.class);
+
+	private static PollingWorker self = null;
+
+	private LinkedBlockingQueue tasks = new LinkedBlockingQueue(100);
+	private long interval = 1000L;
+	private Thread worker = null;
+	private AtomicLong[] counters = null;
+	private int[] bucketUnit = null;
+	private static boolean enabled = false;
+	private Timer timer = null;
+
+	private PollingWorker(Properties ctxprops) {
+		if (ctxprops == null || ctxprops.getProperty("org.onap.ccsdk.dblib.pm") == null) {
+			enabled = false;
+		} else {
+			if ("true".equalsIgnoreCase((String) ctxprops.getProperty("org.onap.ccsdk.dblib.pm"))) {
+				enabled = true;
+			} else {
+				enabled = false;
+			}
+		}
+
+		interval = Long.parseLong((ctxprops == null || ctxprops.getProperty("org.onap.ccsdk.dblib.pm.interval") == null)
+				? "60" : (String) ctxprops.getProperty("org.onap.ccsdk.dblib.pm.interval"));
+		// '0' bucket is to count exceptions
+		String[] sampling = ((ctxprops == null || ctxprops.getProperty("org.onap.ccsdk.dblib.pm.sampling") == null)
+				? "0,2,5,10,20,50,100" : (String) ctxprops.getProperty("org.onap.ccsdk.dblib.pm.sampling")).split(",");
+
+		if (enabled) {
+			bucketUnit = new int[sampling.length];
+			for (int i = 0, max = bucketUnit.length; i < max; i++) {
+				bucketUnit[i] = Integer.parseInt(sampling[i].trim());
+			}
+			counters = new AtomicLong[bucketUnit.length + 1];
+			for (int i = 0, max = counters.length; i < max; i++) {
+				counters[i] = new AtomicLong();
+			}
+			worker = new Thread(this);
+			worker.setDaemon(true);
+			worker.start();
+			timer = new Timer(true);
+			timer.schedule(new MyTimerTask(), interval * 1000L, interval * 1000L);
+		}
+	}
+
+	public static void post(long starttime) {
+		PollingWorker temp = self;
+		if (temp != null && enabled) {
+			temp.register(new TestSample(starttime));
+		}
+	}
+
+	public static void createInistance(Properties props) {
+		self = new PollingWorker(props);
+	}
+
+	private void register(TestSample object) {
+		try {
+			tasks.add(object);
+		} catch (Throwable exc) {
+			// if cannot add an object to the queue, do nothing
+		}
+	}
+
+	private void deRegister(TestSample object) {
+		tasks.remove(object);
+	}
+
+	@Override
+	public void run() {
+		for (;;) {
+			Set data = new TreeSet();
+			tasks.drainTo(data);
+			for (Iterator it = data.iterator(); it.hasNext();) {
+				Object next = it.next();
+				if (next instanceof TestSample) {
+					consume((TestSample) next);
+				} else {
+					System.out.println(next.getClass().getName());
+					LOGGER.error(next.getClass().getName());
+				}
+			}
+			try {
+				Thread.sleep(1000);
+			} catch (InterruptedException e) {
+				e.printStackTrace();
+
+			}
+		}
+
+	}
+
+	public void clearReqister() {
+		AtomicLong[] tmp = new AtomicLong[counters.length];
+		for (int i = 0, max = tmp.length; i < max; i++) {
+			tmp[i] = new AtomicLong();
+		}
+		AtomicLong[] tmp2 = counters;
+		synchronized (tmp2) {
+			counters = tmp;
+		}
+		StringBuffer sb = new StringBuffer("CPM: ");
+		for (int i = 0, max = tmp2.length; i < max; i++) {
+			if (i == 0 && bucketUnit[0] == 0) {
+				sb.append("[Exc]=");
+			} else {
+				sb.append("[");
+				if (i == bucketUnit.length) {
+					sb.append("Other]=");
+				} else {
+					sb.append(bucketUnit[i]).append(" ms]=");
+				}
+			}
+			sb.append(tmp2[i].get()).append("\t");
+		}
+		LOGGER.info(sb.toString());
+	}
+
+	class MyTimerTask extends TimerTask {
+
+		@Override
+		public void run() {
+
+			clearReqister();
+		}
+
+	}
+
+	private void consume(TestSample probe) {
+		AtomicLong[] tmp = counters;
+		synchronized (tmp) {
+			counters[getBucket(probe.getDuration())].incrementAndGet();
+		}
+	}
+
+	/*
+	 * This method is used to find the offset of the bucket in counters.
+	 * 'counters' array is 1 size longer than bucketUnit, hence by default it
+	 * returns 'bucketUnit.length'
+	 */
+	private int getBucket(long difftime) {
+		for (int i = 0; i < bucketUnit.length; i++) {
+			if (difftime < bucketUnit[i]) {
+				return i;
+			}
+		}
+		return bucketUnit.length;
+	}
+
+	private static boolean isEnabled() {
+		return enabled;
+	}
+
+	/**
+	 * @author Rich Tabedzki
+	 *  A helper class to pass measured parameter to the counter.
+	 */
+	static class TestSample implements Comparable {
+		private long starttime;
+		private long endtime;
+
+		public TestSample(long starttime) {
+			this.endtime = System.currentTimeMillis();
+			this.starttime = starttime;
+		}
+
+		public long getDuration() {
+			return endtime - starttime;
+		}
+
+		@Override
+		public int compareTo(Object o) {
+			if (o instanceof TestSample) {
+				TestSample x = (TestSample) o;
+				if (starttime < x.starttime)
+					return 1;
+				if (endtime < x.endtime)
+					return 1;
+				if (starttime > x.starttime)
+					return -1;
+				if (endtime > x.endtime)
+					return -1;
+				return 0;
+			}
+			return 1;
+		}
+
+		@Override
+		public int hashCode() {
+			final int prime = 31;
+			int result = 1;
+			result = prime * result + (int) (endtime ^ (endtime >>> 32));
+			result = prime * result + (int) (starttime ^ (starttime >>> 32));
+			return result;
+		}
+
+		@Override
+		public boolean equals(Object obj) {
+			if (this == obj)
+				return true;
+			if (obj == null)
+				return false;
+			if (getClass() != obj.getClass())
+				return false;
+			TestSample other = (TestSample) obj;
+			if (endtime != other.endtime)
+				return false;
+			if (starttime != other.starttime)
+				return false;
+			return true;
+		}
+	}
+}