Multi-thread

Question

package com.bindhuw.saro.corpactions.control;
import java.util.Date;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.logging.impl.Log4JLogger;
import org.apache.log4j.LogManager;
import com.bindhuw.saro.common.saroMultiProcess;
* @author
* @version 1.0
* @Description saro Application Main class for the Event Manager background process. The class runs the following 4 threads:
* CAInitialReconGenerator,CaStatementGenerator CaTaskGenerator & CATaskController
public class CAEventManager extends saroMultiProcess {
// Name of the process
public static final String PROCESS_NAME = "caEventManager";
* The instance of logger for logging
// private static Category logger;
private static Log logger;
* Constructor of the class.
* @param port Port number
* @param envId Environment id.
* @param processId Process id.
* @param termId Terminal id.
* @param procName Process name.
public CAEventManager(int port, int envId, int processId, String termId, String procName) {
super(port, envId, processId, termId, procName);
* Main fucntion to start the service.
* @param args Command line arguments.
static public void main(String[] args) {
final int NO_OF_PARAMS = 5;
// check for valid number of parameters
if (args.length < NO_OF_PARAMS) {
System.err.println("Invalid number of command line parameters: " + args.length);
System.err.println("Expected number of command line parameters: " + NO_OF_PARAMS);
System.exit(1);
logger = LogFactory.getLog(PROCESS_NAME);
// print some messages
String msgPrefix = "[SYSTEM][" + PROCESS_NAME + "]";
logger.fatal(msgPrefix + "Process starting...");
Date now = new Date();
logger.info("************************************************************");
logger.info("* Process : " + PROCESS_NAME);
logger.info("* Time Stamp: " + now);
logger.info("************************************************************");
try {
System.setProperty("CONFIG_BASE", args[4]);
// load properties
loadPropertiesFor(PROCESS_NAME);
logger.info("Loaded properties from file: " + getPropertiesFile());
int port = Integer.parseInt(args[0]);
int envId = Integer.parseInt(args[1]);
int processId = Integer.parseInt(args[2]);
CAEventManager eventMgr = new CAEventManager(port, envId, processId, args[3], PROCESS_NAME);
eventMgr.getChildProcesses().add(new CAInitialReconGenerator(eventMgr));
eventMgr.getChildProcesses().add(new CAStatementGenerator(eventMgr));
eventMgr.getChildProcesses().add(new CATaskGenerator(eventMgr));
eventMgr.getChildProcesses().add(new CATaskController(eventMgr));
eventMgr.getChildProcesses().add(new CADirectoryWatcher(eventMgr));
eventMgr.startServer();
} catch (Throwable t) {
logger.error(msgPrefix + "Server startup exception: " + t.getMessage());
logger.info("Stack trace: ", t);
} finally {
logger.fatal(msgPrefix + "Process exiting...");
// Category.shutdown();
if (logger instanceof Log4JLogger) {
LogManager.shutdown();
System.exit(0);
* saroMultiProcess.java
* Copyright (c) 2001 bindhu
* All Rights Reserved.
* Fixed Income Banking Products
package com.bindhuw.saro.common;
import static com.bindhuw.saro.infrastructure.util.FileUtility.constructEtcPath;
import static com.bindhuw.saro.infrastructure.util.FileUtility.locate;
import static java.lang.String.format;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.Properties;
import org.apache.commons.logging.Log;
import org.xml.sax.SAXException;
import com.bindhuw.saro.infrastructure.dao.saroUtilDao;
import com.bindhuw.saro.infrastructure.exception.saroException;
import com.bindhuw.saro.infrastructure.exception.saroInvalidPropertyException;
import com.bindhuw.saro.infrastructure.file.PasswordFileReader2;
import com.bindhuw.saro.infrastructure.file.PasswordObject;
import com.bindhuw.saro.infrastructure.model.saroMqDefinition;
import com.bindhuw.saro.infrastructure.util.MqUtilities;
import com.bindhuw.saro.infrastructure.util.YorN;
* Models the saro process capable of running multiple threads.
* @author Veera Shivanantham, Anant Kumar Mishra
* @version %I%, %G%
* @see com.bindhuw.saro.common.saroMultiProcess.java
public class saroMultiProcess extends csaroProcess {
// Sleep time for the main thread - 5000 ms (5 sec)
private static final int SLEEP_TIME = 5000;
// Contains the list of saroChildProcess
private List childProcesses;
// flag that holds the request for stopping the process
private boolean alreadyRequestedToStop;
// properties file
private static String propertiesFile;
// debug flag
private static final boolean DEBUG = false;
* Only constructor.
* @param port
* @param envId
* @param processId
* @param termId
* @param processName
public saroMultiProcess(int port, int envId, int processId, String termId, String processName) {
super(port, envId, processId, termId, processName);
this.childProcesses = new ArrayList(10);
* Start all the child processes in the server
public void startServer() {
// // rfs 545
// String killServerOnAllErrors = System.getProperty("KILL_SERVER_ON_ALL_ERRORS");
// if (killServerOnAllErrors != null && killServerOnAllErrors.trim().length() > 0) {
// killServerOnAllErrors = killServerOnAllErrors.trim();
// if (killServerOnAllErrors.startsWith("Y") || killServerOnAllErrors.startsWith("y")
// || killServerOnAllErrors.startsWith("T") || killServerOnAllErrors.startsWith("t")
// || killServerOnAllErrors.startsWith("1"))
// setFlagOn(FLAG_KILL_SERVER_ON_ALL_ERRORS);
for (int i = 0; i < childProcesses.size(); i++) {
saroChildProcess child = (saroChildProcess) childProcesses.get(i);
child.start();
while (this.getStatus() != isaroProcess.SERVER_REQUEST_TO_KILL) {
try {
Thread.sleep(SLEEP_TIME); // sleep for 5 sec.
} catch (InterruptedException ie) {
ie.printStackTrace();
boolean allThreadsDead = true;
for (int i = 0; i < childProcesses.size(); i++) {
saroChildProcess child = (saroChildProcess) childProcesses.get(i);
if (child.isAlive()) {
allThreadsDead = false;
break;
if (allThreadsDead) {
setStatus(isaroProcess.SERVER_REQUEST_TO_KILL);
stopProcess();
* Over rided parent, to check all the child are done and closed properly.
public synchronized void stopProcess() {
if (alreadyRequestedToStop) return;
else alreadyRequestedToStop = true;
// Check all the childs are free. if they are, then stop the childs and exit.
boolean childAlive = true;
while (childAlive) {
childAlive = false;
for (int count = 0; count < childProcesses.size(); count++) {
saroChildProcess child = (saroChildProcess) childProcesses.get(count);
if (child.getServiceStatus() == saroChildProcess.SERVICE_BUSY) {
// If one child is alive no need to check for other childs, go to sleep until childs are
// stopped.
childAlive = true;
if (DEBUG)
System.out.println("[SYSTEM][CHILD]-[" + child.getServiceName() + "]- Alive.");
} else if (child.getServiceStatus() == saroChildProcess.SERVICE_NO_BUSY && child.isAlive()) {
// child thread is sleeping, wake it up to make the exit faster
child.interrupt();
if (childAlive) {
if (DEBUG)
System.out.println("[SYSTEM]-Childs are active, sleeping for " + SLEEP_TIME / 1000
+ " seconds.");
try {
Thread.sleep(SLEEP_TIME); // Sleep for 5 seconds.
} catch (InterruptedException ie) {
if (DEBUG) System.out.println("[SYSTEM]-All child process are finished.");
super.stopProcess();
* Child raised the error. stop all the childs and clean exit of the process.
* @param child
public void raiseClientError(saroChildProcess child) {
System.out.println("[SYSTEM][CHILD]-[" + child.getServiceName() + "]- Child raised the error.");
this.setStatus(isaroProcess.SERVER_REQUEST_TO_KILL);
System.out.println("[SYSTEM] - Closing down all the childs and the system.");
stopProcess();
* Load the properties file from saro_BASE/etc/<process_name>.properties
* @param process name of the process
* @throws FileNotFoundException
* @throws IOException
* @throws saroException
public static void loadPropertiesFor(String process) throws FileNotFoundException, IOException,
saroException {
// try opening it using saro_BASE system property
propertiesFile = System.getProperty("CONFIG_BASE");
if (propertiesFile != null && propertiesFile.trim().length() > 0) {
if (!propertiesFile.trim().endsWith(File.separator))
propertiesFile = propertiesFile.trim() + File.separator;
propertiesFile += ("etc" + File.separator + process + ".properties");
} else {
throw new saroException(" Invalid CONFIG_BASE property: " + propertiesFile
+ ". Unable to locate properties file using this property!");
loadProperties(propertiesFile);
* Loads the properties from the file to the system properties. If the properties value match the password
* file entry pattern the corresponding value from the password file is loaded.
* @param file
public static void loadProperties(String file) throws FileNotFoundException, IOException,
saroInvalidPropertyException, saroException {
propertiesFile = file;
Properties props = new Properties();
props.load(new FileInputStream(propertiesFile));
PasswordFileReader2 passwordFileReader = new PasswordFileReader2();
PasswordObject oPasswordObject = new PasswordObject();
// load the values to the system properties
Enumeration keys = props.keys();
while (keys.hasMoreElements()) {
String key = (String) keys.nextElement();
String value = null;
if (PasswordFileReader2.looksLikePasswordFileKey(props.getProperty(key))) value = passwordFileReader
.getValue(props.getProperty(key)).getValue();
else value = props.getProperty(key);
if (value == null || value.trim().length() == 0)
throw new saroInvalidPropertyException("The value of property " + key
+ " is either null or blank.");
System.setProperty(key, value);
// load DB Properties...
int noOfPools = Integer.parseInt(System.getProperty("NUMBER_OF_POOLS"));
for (int i = 1; i <= noOfPools; i++) {
String[] strURLArray = null;
oPasswordObject = passwordFileReader.getValue(System.getProperty("DBPOOL_DS_NAME_" + i), "SYB",
"URL");
System.setProperty("DBPOOL_SYBASE_URL_" + i, oPasswordObject.getValue());
strURLArray = PasswordFileReader2.splitURL(oPasswordObject.getValue());
System.setProperty("DBPOOL_SERVER_NAME_" + i, strURLArray[3]);
System.setProperty("DBPOOL_PORT_NUMBER_" + i, strURLArray[4]);
oPasswordObject = passwordFileReader.getValue(System.getProperty("DBPOOL_DS_NAME_" + i), "SYB",
"DBN");
System.setProperty("DBPOOL_DB_NAME_" + i, oPasswordObject.getValue());
oPasswordObject = passwordFileReader.getValue(System.getProperty("DBPOOL_DS_NAME_" + i), "SYB",
"USR");
System.setProperty("DB_USER_" + i, oPasswordObject.getValue());
oPasswordObject = passwordFileReader.getValue(System.getProperty("DBPOOL_DS_NAME_" + i), "SYB",
"PWD");
System.setProperty("DB_PASS_" + i, oPasswordObject.getValue());
System.setProperty("DB_USER", System.getProperty("DB_USER_1"));
System.setProperty("DB_PASS", System.getProperty("DB_PASS_1"));
* This method fetches the MQ details from the static table <code>saroMqDefinitions</code> based on the
* <code>processName</code> . For each Mq detail, it then generates mba.xml file only if enabled flag in
* the table is Y and (the mba.xml does not exists for the particular MQ or the boolean createFile flag is
* set to true). Then it loads the child process with argument <code>MqDefinitions</code> and name of
* the class.
* @param logger - For logging reports
* @param processName - MQ definitions are picked based on this process name
* @param serviceName - Name of the service
* @param serviceClass - class of the saroChildProcess3 which we want to run
* @param createNewFile - new mba.xml file is created if true. else mba.xml is created only if not
* present.
* @throws saroInvalidPropertyException
* @throws SQLException
* @throws SAXException
* @throws IOException
* @throws SecurityException
* @throws NoSuchMethodException
* @throws IllegalArgumentException
* @throws InstantiationException
* @throws IllegalAccessException
* @throws InvocationTargetException
protected void loadChildProcesses(Log logger, String processName, String serviceName, Class serviceClass,
boolean createNewFile) throws saroInvalidPropertyException, SQLException, SAXException,
IOException, SecurityException, NoSuchMethodException, IllegalArgumentException,
InstantiationException, IllegalAccessException, InvocationTargetException {
List<saroMqDefinition> list = new saroUtilDao().fetchMqDetails(logger, processName);
for (saroMqDefinition def : list) {
if (def.getEnableFlag() == YorN.Y) {
MqUtilities util = new MqUtilities();
String fileName = serviceName + "." + def.getMqAlias() + ".mba.xml";
String serverFileName = locate(fileName);
if (serverFileName == null || createNewFile) {
serverFileName = constructEtcPath(fileName);
logger.info(format("For mqAlias [%s] writing the file [%s]", def.getMqAlias(),
serverFileName));
String xmlString = util.generateXml(def.toMap());
util.writeFile(serverFileName, xmlString);
} else {
logger.info(format("For mqAlias [%s] using the file [%s]", def.getMqAlias(),
serverFileName));
def.setConfigName(serverFileName);
Constructor constr = serviceClass
.getConstructor(saroMultiProcess.class, saroMqDefinition.class);
saroChildProcess3 w = (saroChildProcess3) constr.newInstance(this, def);
w.setSleepTimeInSecs(def.getSleepTimeInSecs());
w.setServiceActivationStatus(def.getEnableFlag());
getChildProcesses().add(w);
* This method fetches the MQ details from the static table <code>saroMqDefinitions</code> based on the
* <code>processName</code> . For each Mq detail, it then generates mba.xml file only if enabled flag in
* the table is Y and the system property CREATE_NEW_MBA_XML_FILE is set to true. If the property
* CREATE_NEW_MBA_XML_FILE is set to false, then if the mba file already exists, it will not create the
* file. Then it loads the child process with argument <code>MqDefinitions</code> and name of the class.
* @param logger - For logging reports
* @param processName - MQ definitions are picked based on this process name
* @param serviceName - Name of the service
* @param serviceClass - class of the saroChildProcess3 which we want to run
* @throws saroInvalidPropertyException
* @throws SQLException
* @throws SAXException
* @throws IOException
* @throws SecurityException
* @throws NoSuchMethodException
* @throws IllegalArgumentException
* @throws InstantiationException
* @throws IllegalAccessException
* @throws InvocationTargetException
protected void loadChildProcesses(Log logger, String processName, String serviceName, Class serviceClass)
throws saroInvalidPropertyException, SQLException, SAXException, IOException, SecurityException,
NoSuchMethodException, IllegalArgumentException, InstantiationException, IllegalAccessException,
InvocationTargetException {
loadChildProcesses(logger, processName, serviceName, serviceClass, Boolean
.getBoolean("CREATE_NEW_MBA_XML_FILE"));
* Getter for the attribute childProcesses
* @return the list of child processes
public List getChildProcesses() {
return childProcesses;
* Setter for the attribute childProcesses
* @param newChildProcesses
public void setChildProcesses(List newChildProcesses) {
childProcesses = newChildProcesses;
* Getter for the attribute propertiesFile
* @return the value of attribute propertiesFile
public static String getPropertiesFile() {
return propertiesFile;
package com.bindhuw.saro.common;
import com.bindhuw.saro.dbobjects.*;
import com.bindhuw.saro.util.*;
* Title: csaroProcess
* Description:
* Copyright: Copyright (c) 2001
* Company: bindhuW
* @author Veera
* @version 1.0
public class csaroProcess implements isaroProcess{
public static int status = isaroProcess.PROCESS_READY;
public static int serviceCount = 0;
private int controlFlag;
private int loginNumber = 0;
private String userCode = "SYS";
private String loginType = "BACK";
private String hostName;
private int port; //passed In
private int processId; //passed In
private String processName;
private int environmentId; //passed In
private String terminalId; //passed In
private int taskId = 1;
private String longProgramName = "Martini Server";
cUDPService udp;
cUserLoginService userLogin;
public csaroProcess(int port, int envId, int processId, String termId, String processName){
this.setPort(port);
this.setEnvironmentId(envId);
this.processId = processId;
this.terminalId = termId;
this.processName = processName;
//Set the default values.
try{
hostName = java.net.InetAddress.getLocalHost().getHostName();
udp = new cUDPService(this);
udp.setDaemon(true);
userLogin = new cUserLoginService(this);
System.out.println("[SYSTEM]-Starting UDP");
udp.listenToUDP();
System.out.println("[SYSTEM]-Make an entry to User login.");
userLogin.doLogin();
}catch(Exception e) {
System.out.println("[SYSTEM]-Server initialise error.\n"+e.getMessage());
e.printStackTrace();
System.exit(0);
public void finalise() {
userLogin.doLogout();
public void stopProcess() {
System.out.println("[SYSTEM]-Requested to stop this service. Shutting Down System.");
System.out.println("[SYSTEM]-Removing entry from user_login table.");
userLogin.doLogout();
public int getStatus() {
return this.status;
public void setStatus(int status) {
this.status = status;
public int getServiceCount() {
return this.serviceCount;
public String getProcessName() {
return this.processName;
public String getUserCode() {
return this.userCode;
public String getLoginType() {
return this.loginType;
public String getHostName() {
return this.hostName;
public int getPort() {
return this.port;
public int getProcessId() {
return this.processId;
public int getEnvironmentId() {
return this.environmentId;
public String getTerminalId() {
return this.terminalId;
public int getTaskId() {
return this.taskId;
public String getLongProgramName() {
return this.longProgramName;
public int getLoginNumber() {
return loginNumber;
public void setLoginNumber(int loginNum) {
this.loginNumber = loginNum;
public void setHostName(String newHostName) {
hostName = newHostName;
public void setLoginType(String newLoginType) {
loginType = newLoginType;
public void setLongProgramName(String newLongProgramName) {
longProgramName = newLongProgramName;
public void setServiceCount(int newServiceCount) {
this.serviceCount = newServiceCount;
public void setTaskId(int newTaskId) {
taskId = newTaskId;
public void setUserCode(String newUserCode) {
userCode = newUserCode;
public boolean checkService(int serviceId, String client_name) {
if(serviceId == this.SERVICE_START) {
if(this.status == isaroProcess.SERVER_REQUEST_TO_KILL) {
System.out.println("[SYSTEM]-Server flagged to die. No more conections.");
return false;
this.serviceCount ++;
System.out.println("[SYSTEM]-New client connected.("+this.serviceCount+") Clients are connected.");
} else if(serviceId == this.SERVICE_END){
if(this.serviceCount > 0)
this.serviceCount --;
System.out.println("[SYSTEM]-New client connected.("+this.serviceCount+") Clients are connected.");
if(this.status != isaroProcess.SERVER_REQUEST_TO_KILL && this.serviceCount == 0)
setStatus(isaroProcess.PROCESS_READY);
return true;
public void setPort(int newPort) {
port = newPort;
public void setEnvironmentId(int newEnvironmentId) {
environmentId = newEnvironmentId;
public void setProcessId(int newProcessId) {
processId = newProcessId;
public void setProcessName(String newProcessName) {
processName = newProcessName;
public void setTerminalId(String newTerminalId) {
terminalId = newTerminalId;
* Get the value of control flag.
* @return
public int getControlFlag(){
     return controlFlag;
* Set the specified flag on.
* @param flag
public void setFlagOn(int flag) {
     controlFlag |= flag;
* Set the specified flag off.
* @param flag
public void setFlagOff(int flag) {
     controlFlag &= (~flag);
* saroChildProcess3.java
* Copyright (c) 2001 bindhu
* All Rights Reserved.
* Fixed Income Banking Products
package com.bindhuw.saro.common;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.bindhuw.saro.infrastructure.util.YorN;
* Refractored version of the saroChildProcess2. Now uses commons-logging logger.
* @author Veera, Anant
* @version 1.3
* @see com.bindhuw.saro.common.saroChildProcess3.java
public class saroChildProcess3 extends saroChildProcess {
protected Log logger = null;
* Default constructor
public saroChildProcess3() {
super();
logger = LogFactory.getLog(this.getClass());
/** Constructor
* @param newServer Object of saroMultiProcess
public saroChildProcess3(saroMultiProcess newServer) {
this();
setServer(newServer);
* Constructs the object for the server with the specified name
* @param newServer server
* @param name service name
public saroChildProcess3(saroMultiProcess newServer, String name){
this(newServer);
setServiceName(name);
logger = LogFactory.getLog(name);
// set the enabled flag
String enabled = System.getProperty(name + ".enabled", "true");
setServiceActivationStatus(enabled);
// set sleep time
String sleepTimeInSecs = System.getProperty(name + ".sleepTimeInSecs");
if (sleepTimeInSecs != null)
setSleepTimeInSecs(sleepTimeInSecs);
/** Over ride the fundamental behaviour of Runnable target, to acomplish
* the interoprability with saroMultiProcess.
public void run() {
if (getServiceStatus() == SERVICE_DISABLED)
return;
String msgPrefix = "[SYSTEM][" + getServer().getProcessName() + "][" + getServiceName() + "]";
try {
init();
} catch (Exception e) {
setErrorFlag(FATAL_ERROR);
logger.error(msgPrefix + "Error during initialisation of the child process. " + e.getMessage());
logger.info("Stack trace: ", e);
if (getServer().getStatus() != isaroProcess.SERVER_REQUEST_TO_KILL && getErrorFlag() != FATAL_ERROR)
logger.fatal(msgPrefix + "Service launched...");
boolean isAlive = true;
while (isAlive) {
try {
if (getServer().getStatus() == isaroProcess.SERVER_REQUEST_TO_KILL || getErrorFlag() == FATAL_ERROR
          || getErrorFlag() == SERVICE_DONE) {
isAlive = false;
//Set this status flag to SERVICE_NO_BUSY.
setServiceStatus(SERVICE_NO_BUSY);
String msg = null;
if (getErrorFlag() == FATAL_ERROR){
                              msg = "Terminating thread due to the errors above...";
                              if((getServer().getControlFlag() & isaroProcess.FLAG_KILL_SERVER_ON_ALL_ERRORS)
                                             == isaroProcess.FLAG_KILL_SERVER_ON_ALL_ERRORS)
                                   getServer().raiseClientError(this);
}else if(getErrorFlag() == SERVICE_DONE){
     setErrorFlag(SERVICE_DONE);
     msg = "Service completed... ";
} else{
                              msg = "Request to stop the thread...";
logger.error(msgPrefix + msg);
//Break the loop and exit.
break;
} else {
setServiceStatus(SERVICE_BUSY);
performSpecificService();
setServiceStatus(SERVICE_NO_BUSY);
if (getServer().getStatus() != isaroProcess.SERVER_REQUEST_TO_KILL && getErrorFlag() != FATAL_ERROR) {
try {
Thread.sleep(getSleepTimeInSecs() * 1000); //Sleep for specified time.
} catch (InterruptedException ie) {
// do nothing
} catch (Exception e) {
String msg = "Caught an exception:Message:" + e.getMessage();
logger.error(msgPrefix + msg);
logger.info("Stack trace: ", e);
//Set the error Flag. and set the service status to SERVICE_NO_BUSY.
setErrorFlag(FATAL_ERROR);
getServer().raiseClientError(this);
setServiceStatus(SERVICE_NO_BUSY);
//Raise the error to server.
msg = "Informed to the parent with fatal error. " + "Stoping the child process...";
logger.error(msgPrefix + msg);
logger.fatal(msgPrefix + "Thread exiting... ");
try {
clean();
} catch (Exception e) {
setErrorFlag(FATAL_ERROR);
logger.error(msgPrefix + "Error during clean up of the child process. " + e.getMessage());
logger.info("Stack trace: ", e);
* One time initialization. Called before starting the process.
* @throws Exception
protected void init() throws Exception {
* One time cleanup. Called before exiting the process.
* @throws Exception
protected void clean() throws Exception {
* Getter for property logger
* @return the logger
public Log getLogger() {
return logger;
* Setter for property logger
* @param logger - the logger
public void setLogger(Log logger) {
this.logger = logger;
/** Setter for property sleepTimeInSecs.
* @param sleepTimeInSecs New value of property sleepTimeInSecs
public void setSleepTimeInSecs(String sleepTimeInSecs) {
int sleepTime = getSleepTimeInSecs();
try {
sleepTime

Answer 1

Very interesting.
But who will be willing to read that amount of unformatted code - needless to say, you didn't even post a question...or did I miss it in that pile of characters...?