Reach2Ramesh: October 2013

Thursday, October 17, 2013

Message Queue Depth

import com.ibm.mq.MQC;
import com.ibm.mq.MQEnvironment;
import com.ibm.mq.MQQueue;
import com.ibm.mq.MQQueueManager;

public class QueueDepthTest extends ServerConfig {

 /**o
  * @param args
  */
 public static void main(String[] args) {

  QueueDepthTest classObj = null;
  try {
   classObj = new QueueDepthTest();
   final MQRegion env_region = MQRegion.DEV;
   final String queueName = MQQueueNames.CALC_REQUEST
     .getName(env_region);

   classObj.loadConfig(env_region);

   // Set up MQSeries environment
   final String mqQMgr = classObj.cf.getQueueManager();
   MQEnvironment.hostname = classObj.cf.getHostName();
   MQEnvironment.port = classObj.cf.getPort();
   MQEnvironment.channel = classObj.cf.getChannel();
   MQEnvironment.userID = classObj.cf.getClientID();

   System.out.println("******IBM MQ values*****");
   System.out.println("QMgr=" + mqQMgr);
   System.out.println("hostname=" + MQEnvironment.hostname);
   System.out.println("port=" + MQEnvironment.port);
   System.out.println("channel=" + MQEnvironment.channel);

   System.out.println("queue =" + queueName);
   final MQQueueManager qMgr = new MQQueueManager(mqQMgr);
   int openOptions = MQC.MQOO_INQUIRE;
   // int openOptions = CMQC.MQOO_INQUIRE + CMQC.MQOO_FAIL_IF_QUIESCING
   // + CMQC.MQOO_INPUT_SHARED;

   MQQueue destQueue = qMgr.accessQueue(queueName, openOptions);

   final int depth = destQueue.getCurrentDepth();
   System.out.println("printing the queue depth =" + queueName
     + " is=" + depth);
   destQueue.close();
   qMgr.disconnect();
  } catch (Exception err) {
   err.printStackTrace();
  }
 }
}


public enum MQRegion {
 DEV ("hostname", port, "channel","QMgr","ClientID");
 
 
 private String hostName;
 private long port;
 private String channel;
 private String queueManager;
 private String clientId;
 MQRegion(String hostName, int port,  String channel, String queueManager, String clientId) {
  this.hostName = hostName ;
  this.port = port;
  this.channel =channel;
  this.queueManager=queueManager;
  this.clientId = clientId;
 }
 public String getHostName() {
  return hostName;
 }
 public String getChannel() {
  return channel;
 }
 public String getQueueManager() {
  return queueManager;
 }
 public String getClientId() {
  return clientId;
 }
 public long getPort() {
  return port;
 }
}

public enum MQQueueNames {
 QUEUE_NAME("QUEUE_NAME");
 
 
 MQQueueNames(String name) {
  this.name = name;
 }

 private String name;

 public String getName(MQRegion region) {
  switch(region) {
  case DEV:
   return name + ".DEV2";
  case SIN:
   return name + ".SIN1";
  case UAT:
   return name + ".UAT3";
  }
  return name;
 }
}

import javax.jms.BytesMessage;
import javax.jms.ConnectionConsumer;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Queue;
import javax.jms.QueueConnection;
import javax.jms.QueueReceiver;
import javax.jms.QueueSender;
import javax.jms.QueueSession;
import javax.jms.Session;
import javax.jms.TextMessage;

import com.bnym.test.common.ConstantsEnum;
import com.ibm.jms.JMSMessage;
import com.ibm.mq.MQC;
import com.ibm.mq.MQEnvironment;
import com.ibm.mq.jms.MQQueueConnectionFactory;
import com.ibm.mq.jms.MQQueueSender;
import com.ibm.mq.jms.MQQueueSession;

public class ServerConfig {

 protected MQQueueConnectionFactory cf = null;
 protected boolean needConcurrent = false;
 
 protected void loadConfig(MQRegion region) throws JMSException {
  cf = new MQQueueConnectionFactory();
  cf.setHostName(region.getHostName());
  cf.setPort((int) region.getPort());
  cf.setTransportType(1);
  cf.setQueueManager(region.getQueueManager());
  cf.setChannel(region.getChannel());
  cf.setClientId(region.getClientId());
 }
}

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Tuesday, October 8, 2013

Nano seconds in Java

Get backport-util-concurrent.jar from nexus

<dependency>

<groupid>backport-util-concurrent</groupid>

<artifactid>backport-util-concurrent</artifactid>

<version>3.1</version>

</dependency>

code snippet

import java.util.concurrent.TimeUnit;

long timeInMillis = System.currentTimeMillis();

You can use query to get the DB time

select extract(day from(systimestamp - to_timestamp('1970-01-01', 'YYYY-MM-DD'))) * 86400000 + to_number(to_char(sys_extract_utc(systimestamp), 'SSSSSFF3')) current_time_milliseconds

from dual;

Timestamp dbTimeStamp = result of above quey...

long nanos = TimeUnit.SECONDS.toNanos(System.currentTimeMillis());
dbTimeStamp.setNanos((int) (nanos % 1000000000));

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Oracle equivalent of java currentTimeMillis

Instead of the
queryString = "SELECT systimestamp param FROM DUAL";

use the following
select extract(day from(systimestamp - to_timestamp('1970-01-01', 'YYYY-MM-DD'))) * 86400000 + to_number(to_char(sys_extract_utc(systimestamp), 'SSSSSFF3')) current_time_milliseconds
from dual;

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