/**
* Delete a repository connection.
*
* @param name is the name of the connection to delete. If the name does not exist, no error is
* returned.
*/
public void delete(String name) throws ManifoldCFException {
// Grab a job manager handle. We will need to check if any jobs refer to this connection.
IJobManager jobManager = JobManagerFactory.make(threadContext);
StringSetBuffer ssb = new StringSetBuffer();
ssb.add(getRepositoryConnectionsKey());
ssb.add(getRepositoryConnectionKey(name));
StringSet cacheKeys = new StringSet(ssb);
ICacheHandle ch = cacheManager.enterCache(null, cacheKeys, getTransactionID());
try {
beginTransaction();
try {
// Check if any jobs refer to this connection name
if (jobManager.checkIfReference(name))
throw new ManifoldCFException(
"Can't delete repository connection '" + name + "': existing jobs refer to it");
ManifoldCF.noteConfigurationChange();
throttleSpecManager.deleteRows(name);
historyManager.deleteOwner(name);
ArrayList params = new ArrayList();
String query =
buildConjunctionClause(
params, new ClauseDescription[] {new UnitaryClause(nameField, name)});
performDelete("WHERE " + query, params, null);
cacheManager.invalidateKeys(ch);
} catch (ManifoldCFException e) {
signalRollback();
throw e;
} catch (Error e) {
signalRollback();
throw e;
} finally {
endTransaction();
}
} finally {
cacheManager.leaveCache(ch);
}
}
protected void localCleanUp() throws Exception {
IThreadContext tc = ThreadContextFactory.make();
Exception currentException = null;
// First, tear down all jobs, connections, authority connections, and output connections.
try {
IRepositoryConnectionManager connMgr = RepositoryConnectionManagerFactory.make(tc);
IAuthorityConnectionManager authConnMgr = AuthorityConnectionManagerFactory.make(tc);
IOutputConnectionManager outputMgr = OutputConnectionManagerFactory.make(tc);
// Now, get a list of the repository connections
IRepositoryConnection[] connections = connMgr.getAllConnections();
int i = 0;
while (i < connections.length) {
connMgr.delete(connections[i++].getName());
}
// Get a list of authority connections
IAuthorityConnection[] authorities = authConnMgr.getAllConnections();
i = 0;
while (i < authorities.length) {
authConnMgr.delete(authorities[i++].getName());
}
// Finally, get rid of output connections
IOutputConnection[] outputs = outputMgr.getAllConnections();
i = 0;
while (i < outputs.length) {
outputMgr.delete(outputs[i++].getName());
}
} catch (Exception e) {
currentException = e;
}
try {
IDBInterface database =
DBInterfaceFactory.make(
tc,
ManifoldCF.getMasterDatabaseName(),
ManifoldCF.getMasterDatabaseUsername(),
ManifoldCF.getMasterDatabasePassword());
IConnectorManager mgr = ConnectorManagerFactory.make(tc);
IAuthorityConnectorManager authMgr = AuthorityConnectorManagerFactory.make(tc);
IOutputConnectorManager outputMgr = OutputConnectorManagerFactory.make(tc);
IOutputConnectionManager outputConnManager = OutputConnectionManagerFactory.make(tc);
IJobManager jobManager = JobManagerFactory.make(tc);
IRepositoryConnectionManager connManager = RepositoryConnectionManagerFactory.make(tc);
// Deregistration should be done in a transaction
database.beginTransaction();
try {
int i;
String[] connectorClasses = getConnectorClasses();
i = 0;
while (i < connectorClasses.length) {
// Find the connection names that come with this class
String[] connectionNames = connManager.findConnectionsForConnector(connectorClasses[i]);
// For each connection name, modify the jobs to note that the connector is no longer
// installed
jobManager.noteConnectorDeregistration(connectionNames);
// Now that all jobs have been placed into an appropriate state, actually do the
// deregistration itself.
mgr.unregisterConnector(connectorClasses[i]);
i++;
}
String[] authorityClasses = getAuthorityClasses();
i = 0;
while (i < authorityClasses.length) {
authMgr.unregisterConnector(authorityClasses[i]);
i++;
}
String[] outputClasses = getOutputClasses();
i = 0;
while (i < outputClasses.length) {
// Find the connection names that come with this class
String[] connectionNames =
outputConnManager.findConnectionsForConnector(outputClasses[i]);
// For all connection names, notify all agents of the deregistration
AgentManagerFactory.noteOutputConnectorDeregistration(tc, connectionNames);
// Now that all jobs have been placed into an appropriate state, actually do the
// deregistration itself.
outputMgr.unregisterConnector(outputClasses[i]);
i++;
}
} catch (ManifoldCFException e) {
database.signalRollback();
throw e;
} catch (Error e) {
database.signalRollback();
throw e;
} finally {
database.endTransaction();
}
} catch (Exception e) {
if (currentException != null) currentException = e;
}
try {
super.localCleanUp();
} catch (Exception e) {
if (currentException != null) currentException = e;
}
if (currentException != null) throw currentException;
}
protected void localSetUp() throws Exception {
super.localSetUp();
IThreadContext tc = ThreadContextFactory.make();
IDBInterface database =
DBInterfaceFactory.make(
tc,
ManifoldCF.getMasterDatabaseName(),
ManifoldCF.getMasterDatabaseUsername(),
ManifoldCF.getMasterDatabasePassword());
IConnectorManager mgr = ConnectorManagerFactory.make(tc);
IAuthorityConnectorManager authMgr = AuthorityConnectorManagerFactory.make(tc);
IJobManager jobManager = JobManagerFactory.make(tc);
IRepositoryConnectionManager connManager = RepositoryConnectionManagerFactory.make(tc);
IOutputConnectorManager outputMgr = OutputConnectorManagerFactory.make(tc);
IOutputConnectionManager outputConnManager = OutputConnectionManagerFactory.make(tc);
// Deregistration should be done in a transaction
database.beginTransaction();
try {
int i;
String[] connectorClasses = getConnectorClasses();
String[] connectorNames = getConnectorNames();
i = 0;
while (i < connectorClasses.length) {
// First, register connector
mgr.registerConnector(connectorNames[i], connectorClasses[i]);
// Then, signal to all jobs that might depend on this connector that they can switch state
// Find the connection names that come with this class
String[] connectionNames = connManager.findConnectionsForConnector(connectorClasses[i]);
// For each connection name, modify the jobs to note that the connector is now installed
jobManager.noteConnectorRegistration(connectionNames);
i++;
}
String[] authorityClasses = getAuthorityClasses();
String[] authorityNames = getAuthorityNames();
i = 0;
while (i < authorityClasses.length) {
authMgr.registerConnector(authorityNames[i], authorityClasses[i]);
i++;
}
String[] outputClasses = getOutputClasses();
String[] outputNames = getOutputNames();
i = 0;
while (i < outputClasses.length) {
// First, register connector
outputMgr.registerConnector(outputNames[i], outputClasses[i]);
// Then, signal to all jobs that might depend on this connector that they can switch state
// Find the connection names that come with this class
String[] connectionNames = outputConnManager.findConnectionsForConnector(outputClasses[i]);
// For all connection names, notify all agents of the registration
AgentManagerFactory.noteOutputConnectorRegistration(tc, connectionNames);
i++;
}
} catch (ManifoldCFException e) {
database.signalRollback();
throw e;
} catch (Error e) {
database.signalRollback();
throw e;
} finally {
database.endTransaction();
}
}
public void executeTest() throws Exception {
// Hey, we were able to install the file system connector etc.
// Now, create a local test job and run it.
IThreadContext tc = ThreadContextFactory.make();
// Create a basic file system connection, and save it.
IRepositoryConnectionManager mgr = RepositoryConnectionManagerFactory.make(tc);
IRepositoryConnection conn = mgr.create();
conn.setName("File Connection");
conn.setDescription("File Connection");
conn.setClassName("org.apache.manifoldcf.crawler.connectors.filesystem.FileConnector");
conn.setMaxConnections(100);
// Now, save
mgr.save(conn);
// Create a basic null output connection, and save it.
IOutputConnectionManager outputMgr = OutputConnectionManagerFactory.make(tc);
IOutputConnection outputConn = outputMgr.create();
outputConn.setName("Null Connection");
outputConn.setDescription("Null Connection");
outputConn.setClassName("org.apache.manifoldcf.agents.output.nullconnector.NullConnector");
outputConn.setMaxConnections(100);
// Now, save
outputMgr.save(outputConn);
// Create a job.
IJobManager jobManager = JobManagerFactory.make(tc);
IJobDescription job = jobManager.createJob();
job.setDescription("Test Job");
job.setConnectionName("File Connection");
job.setOutputConnectionName("Null Connection");
job.setType(job.TYPE_SPECIFIED);
job.setStartMethod(job.START_DISABLE);
job.setHopcountMode(job.HOPCOUNT_ACCURATE);
// Now, set up the document specification.
DocumentSpecification ds = job.getSpecification();
// Crawl everything underneath the 'testdata' area
File testDataFile = new File("testdata").getCanonicalFile();
if (!testDataFile.exists())
throw new ManifoldCFException(
"Test data area not found! Looking in " + testDataFile.toString());
if (!testDataFile.isDirectory())
throw new ManifoldCFException(
"Test data area not a directory! Looking in " + testDataFile.toString());
SpecificationNode sn = new SpecificationNode("startpoint");
sn.setAttribute("path", testDataFile.toString());
SpecificationNode n = new SpecificationNode("include");
n.setAttribute("type", "file");
n.setAttribute("match", "*");
sn.addChild(sn.getChildCount(), n);
n = new SpecificationNode("include");
n.setAttribute("type", "directory");
n.setAttribute("match", "*");
sn.addChild(sn.getChildCount(), n);
ds.addChild(ds.getChildCount(), sn);
// Set up the output specification.
OutputSpecification os = job.getOutputSpecification();
// Null output connections have no output specification, so this is a no-op.
// Save the job.
jobManager.save(job);
// Create the test data files.
FileHelper.createFile(new File("testdata/test1.txt"), "This is a test file");
FileHelper.createFile(new File("testdata/test2.txt"), "This is another test file");
FileHelper.createDirectory(new File("testdata/testdir"));
FileHelper.createFile(new File("testdata/testdir/test3.txt"), "This is yet another test file");
// Now, start the job, and wait until it completes.
jobManager.manualStart(job.getID());
instance.waitJobInactiveNative(jobManager, job.getID(), 120000L);
// Check to be sure we actually processed the right number of documents.
JobStatus status = jobManager.getStatus(job.getID());
// The test data area has 3 documents and one directory, and we have to count the root directory
// too.
if (status.getDocumentsProcessed() != 5)
throw new ManifoldCFException(
"Wrong number of documents processed - expected 5, saw "
+ new Long(status.getDocumentsProcessed()).toString());
// Add a file and recrawl using minimal crawl
FileHelper.createFile(new File("testdata/testdir/test4.txt"), "Added file");
// Now, start the job, and wait until it completes.
jobManager.manualStart(job.getID(), true);
instance.waitJobInactiveNative(jobManager, job.getID(), 120000L);
status = jobManager.getStatus(job.getID());
// The test data area has 4 documents and one directory, and we have to count the root directory
// too.
if (status.getDocumentsProcessed() != 6)
throw new ManifoldCFException(
"Wrong number of documents processed after add - expected 6, saw "
+ new Long(status.getDocumentsProcessed()).toString());
// Change a file, and recrawl, once again using minimal
FileHelper.changeFile(new File("testdata/test1.txt"), "Modified contents");
// Now, start the job, and wait until it completes.
jobManager.manualStart(job.getID(), true);
instance.waitJobInactiveNative(jobManager, job.getID(), 120000L);
status = jobManager.getStatus(job.getID());
// The test data area has 4 documents and one directory, and we have to count the root directory
// too.
if (status.getDocumentsProcessed() != 6)
throw new ManifoldCFException(
"Wrong number of documents processed after change - expected 6, saw "
+ new Long(status.getDocumentsProcessed()).toString());
// We also need to make sure the new document was indexed. Have to think about how to do this
// though.
// MHL
// Delete a file, and recrawl
FileHelper.removeFile(new File("testdata/test2.txt"));
// Do a minimal recrawl first; the delete should not be picked up.
jobManager.manualStart(job.getID(), true);
instance.waitJobInactiveNative(jobManager, job.getID(), 120000L);
status = jobManager.getStatus(job.getID());
// The test data area has 4 documents and one directory, and we have to count the root directory
// too.
if (status.getDocumentsProcessed() != 6)
throw new ManifoldCFException(
"Wrong number of documents processed after delete with minimal crawl - expected 6, saw "
+ new Long(status.getDocumentsProcessed()).toString());
// Now, do a complete crawl - the delete should be found now.
jobManager.manualStart(job.getID());
instance.waitJobInactiveNative(jobManager, job.getID(), 120000L);
// Check to be sure we actually processed the right number of documents.
status = jobManager.getStatus(job.getID());
// The test data area has 3 documents and one directory, and we have to count the root directory
// too.
if (status.getDocumentsProcessed() != 5)
throw new ManifoldCFException(
"Wrong number of documents processed after delete - expected 5, saw "
+ new Long(status.getDocumentsProcessed()).toString());
// Now, delete the job.
jobManager.deleteJob(job.getID());
instance.waitJobDeletedNative(jobManager, job.getID(), 120000L);
// Cleanup is automatic by the base class, so we can feel free to leave jobs and connections
// lying around.
}
/**
* Save a repository connection object.
*
* @param object is the object to save.
* @return true if the object was created, false otherwise.
*/
public boolean save(IRepositoryConnection object) throws ManifoldCFException {
StringSetBuffer ssb = new StringSetBuffer();
ssb.add(getRepositoryConnectionsKey());
ssb.add(getRepositoryConnectionKey(object.getName()));
StringSet cacheKeys = new StringSet(ssb);
while (true) {
// Catch deadlock condition
long sleepAmt = 0L;
try {
ICacheHandle ch = cacheManager.enterCache(null, cacheKeys, getTransactionID());
try {
beginTransaction();
try {
// performLock();
// Notify of a change to the configuration
ManifoldCF.noteConfigurationChange();
boolean isNew = object.getIsNew();
// See whether the instance exists
ArrayList params = new ArrayList();
String query =
buildConjunctionClause(
params,
new ClauseDescription[] {new UnitaryClause(nameField, object.getName())});
IResultSet set =
performQuery(
"SELECT * FROM " + getTableName() + " WHERE " + query + " FOR UPDATE",
params,
null,
null);
HashMap values = new HashMap();
values.put(descriptionField, object.getDescription());
values.put(classNameField, object.getClassName());
values.put(groupNameField, object.getACLAuthority());
values.put(maxCountField, new Long((long) object.getMaxConnections()));
String configXML = object.getConfigParams().toXML();
values.put(configField, configXML);
boolean notificationNeeded = false;
boolean isCreated;
if (set.getRowCount() > 0) {
// If the object is supposedly new, it is bad that we found one that already exists.
if (isNew)
throw new ManifoldCFException(
"Repository connection '" + object.getName() + "' already exists");
isCreated = false;
IResultRow row = set.getRow(0);
String oldXML = (String) row.getValue(configField);
if (oldXML == null || !oldXML.equals(configXML)) notificationNeeded = true;
// Update
params.clear();
query =
buildConjunctionClause(
params,
new ClauseDescription[] {new UnitaryClause(nameField, object.getName())});
performUpdate(values, " WHERE " + query, params, null);
throttleSpecManager.deleteRows(object.getName());
} else {
// If the object is not supposed to be new, it is bad that we did not find one.
if (!isNew)
throw new ManifoldCFException(
"Repository connection '" + object.getName() + "' no longer exists");
isCreated = true;
// Insert
values.put(nameField, object.getName());
// We only need the general key because this is new.
performInsert(values, null);
}
// Write secondary table stuff
throttleSpecManager.writeRows(object.getName(), object);
// If notification required, do it.
if (notificationNeeded) {
IJobManager jobManager = JobManagerFactory.make(threadContext);
jobManager.noteConnectionChange(object.getName());
}
cacheManager.invalidateKeys(ch);
return isCreated;
} catch (ManifoldCFException e) {
signalRollback();
throw e;
} catch (Error e) {
signalRollback();
throw e;
} finally {
endTransaction();
}
} finally {
cacheManager.leaveCache(ch);
}
} catch (ManifoldCFException e) {
// Is this a deadlock exception? If so, we want to try again.
if (e.getErrorCode() != ManifoldCFException.DATABASE_TRANSACTION_ABORT) throw e;
sleepAmt = getSleepAmt();
} finally {
sleepFor(sleepAmt);
}
}
}
/** Reset */
@Override
protected void performResetLogic(IThreadContext tc, String processID) throws ManifoldCFException {
IJobManager jobManager = JobManagerFactory.make(tc);
jobManager.resetDocCleanupWorkerStatus(processID);
ddq.clear();
}
public void run() {
resetManager.registerMe();
try {
// Create a thread context object.
IThreadContext threadContext = ThreadContextFactory.make();
IJobManager jobManager = JobManagerFactory.make(threadContext);
IRepositoryConnectionManager connectionMgr =
RepositoryConnectionManagerFactory.make(threadContext);
IDBInterface database =
DBInterfaceFactory.make(
threadContext,
ManifoldCF.getMasterDatabaseName(),
ManifoldCF.getMasterDatabaseUsername(),
ManifoldCF.getMasterDatabasePassword());
// Loop
while (true) {
// Do another try/catch around everything in the loop
try {
// Before we begin, conditionally reset
resetManager.waitForReset(threadContext);
// Accumulate the wait before doing the next check.
// We start with 10 seconds, which is the maximum. If there's a service request
// that's faster than that, we'll adjust the time downward.
long waitTime = 10000L;
if (Logging.threads.isDebugEnabled()) Logging.threads.debug("Checking for deleting jobs");
// See if there are any starting jobs.
// Note: Since this following call changes the job state, we must be careful to reset it
// on any kind of failure.
JobDeleteRecord[] deleteJobs = jobManager.getJobsReadyForDelete(processID);
try {
if (deleteJobs.length == 0) {
ManifoldCF.sleep(waitTime);
continue;
}
if (Logging.threads.isDebugEnabled())
Logging.threads.debug(
"Found " + Integer.toString(deleteJobs.length) + " jobs ready to be deleted");
long currentTime = System.currentTimeMillis();
// Loop through jobs
int i = 0;
while (i < deleteJobs.length) {
JobDeleteRecord jsr = deleteJobs[i++];
Long jobID = jsr.getJobID();
try {
jobManager.prepareDeleteScan(jobID);
// Start deleting this job!
jobManager.noteJobDeleteStarted(jobID, currentTime);
jsr.noteStarted();
} catch (ManifoldCFException e) {
if (e.getErrorCode() == ManifoldCFException.INTERRUPTED)
throw new InterruptedException();
if (e.getErrorCode() == ManifoldCFException.DATABASE_CONNECTION_ERROR) throw e;
// We cannot abort the delete startup, but if we fall through, we'll put the job
// back into
// the state whence it came. So, fall through.
Logging.threads.error("Exception tossed: " + e.getMessage(), e);
}
}
} finally {
// Clean up all jobs that did not start
ManifoldCFException exception = null;
int i = 0;
while (i < deleteJobs.length) {
JobDeleteRecord jsr = deleteJobs[i++];
if (!jsr.wasStarted()) {
// Clean up from failed start.
try {
jobManager.resetStartDeleteJob(jsr.getJobID());
} catch (ManifoldCFException e) {
exception = e;
}
}
}
if (exception != null) throw exception;
}
// Sleep for the retry interval.
ManifoldCF.sleep(waitTime);
} catch (ManifoldCFException e) {
if (e.getErrorCode() == ManifoldCFException.INTERRUPTED) break;
if (e.getErrorCode() == ManifoldCFException.DATABASE_CONNECTION_ERROR) {
resetManager.noteEvent();
Logging.threads.error(
"Start delete thread aborting and restarting due to database connection reset: "
+ e.getMessage(),
e);
try {
// Give the database a chance to catch up/wake up
ManifoldCF.sleep(10000L);
} catch (InterruptedException se) {
break;
}
continue;
}
// Log it, but keep the thread alive
Logging.threads.error("Exception tossed: " + e.getMessage(), e);
if (e.getErrorCode() == ManifoldCFException.SETUP_ERROR) {
// Shut the whole system down!
System.exit(1);
}
} catch (InterruptedException e) {
// We're supposed to quit
break;
} catch (OutOfMemoryError e) {
System.err.println("agents process ran out of memory - shutting down");
e.printStackTrace(System.err);
System.exit(-200);
} catch (Throwable e) {
// A more severe error - but stay alive
Logging.threads.fatal("Error tossed: " + e.getMessage(), e);
}
}
} catch (Throwable e) {
// Severe error on initialization
System.err.println("agents process could not start - shutting down");
Logging.threads.fatal("StartDeleteThread initialization error tossed: " + e.getMessage(), e);
System.exit(-300);
}
}
public static void main(String[] args) {
if (args.length != 13) {
System.err.println(
"Usage: DefineJob <description> <connection_name> <output_name> <type> <start_method> <hopcount_method> <recrawl_interval> <expiration_interval> <reseed_interval> <job_priority> <hop_filters> <filespec_xml> <outputspec_xml>");
System.err.println("<type> is one of: continuous or specified");
System.err.println("<start_method> is one of: windowbegin, windowinside, disable");
System.err.println("<hopcount_method> is one of: accurate, nodelete, neverdelete");
System.err.println("<recrawl_interval> is the default document recrawl interval in minutes");
System.err.println(
"<expiration_interval> is the default document expiration interval in minutes");
System.err.println("<reseed_interval> is the default document reseed interval in minutes");
System.err.println("<job_priority> is the job priority (and integer between 0 and 10)");
System.err.println(
"<hop_filters> is a comma-separated list of tuples, of the form 'linktype=maxhops'");
System.err.println(
"<filespec_xml> is the document specification XML, its form dependent on the connection type");
System.err.println(
"<outputspec_xml> is the output specification XML, its form dependent on the output connection type");
System.exit(-1);
}
String description = args[0];
String connectionName = args[1];
String outputConnectionName = args[2];
String typeString = args[3];
String startString = args[4];
String hopcountString = args[5];
String recrawlInterval = args[6];
String expirationInterval = args[7];
String reseedInterval = args[8];
String jobPriority = args[9];
String hopFilters = args[10];
String filespecXML = args[11];
String outputspecXML = args[12];
try {
IThreadContext tc = ThreadContextFactory.make();
ManifoldCF.initializeEnvironment(tc);
IJobManager jobManager = JobManagerFactory.make(tc);
IJobDescription desc = jobManager.createJob();
desc.setDescription(description);
desc.setConnectionName(connectionName);
desc.setOutputConnectionName(outputConnectionName);
if (typeString.equals("continuous")) desc.setType(IJobDescription.TYPE_CONTINUOUS);
else if (typeString.equals("specified")) desc.setType(IJobDescription.TYPE_SPECIFIED);
else throw new ManifoldCFException("Unknown type: '" + typeString + "'");
if (startString.equals("windowbegin")) desc.setStartMethod(IJobDescription.START_WINDOWBEGIN);
else if (startString.equals("windowinside"))
desc.setStartMethod(IJobDescription.START_WINDOWINSIDE);
else if (startString.equals("disable")) desc.setStartMethod(IJobDescription.START_DISABLE);
else throw new ManifoldCFException("Unknown start method: '" + startString + "'");
if (hopcountString.equals("accurate"))
desc.setHopcountMode(IJobDescription.HOPCOUNT_ACCURATE);
else if (hopcountString.equals("nodelete"))
desc.setHopcountMode(IJobDescription.HOPCOUNT_NODELETE);
else if (hopcountString.equals("neverdelete"))
desc.setHopcountMode(IJobDescription.HOPCOUNT_NEVERDELETE);
else throw new ManifoldCFException("Unknown hopcount mode: '" + hopcountString + "'");
if (recrawlInterval.length() > 0) desc.setInterval(new Long(recrawlInterval));
if (expirationInterval.length() > 0) desc.setExpiration(new Long(expirationInterval));
if (reseedInterval.length() > 0) desc.setReseedInterval(new Long(reseedInterval));
desc.setPriority(Integer.parseInt(jobPriority));
String[] hopFilterSet = hopFilters.split(",");
int i = 0;
while (i < hopFilterSet.length) {
String hopFilter = hopFilterSet[i++];
if (hopFilter != null && hopFilter.length() > 0) {
String[] stuff = hopFilter.trim().split("=");
if (stuff != null && stuff.length == 2)
desc.addHopCountFilter(stuff[0], ((stuff[1].length() > 0) ? new Long(stuff[1]) : null));
}
}
desc.getSpecification().fromXML(filespecXML);
if (outputspecXML.length() > 0) desc.getOutputSpecification().fromXML(outputspecXML);
// Now, save
jobManager.save(desc);
System.out.print(desc.getID().toString());
} catch (Exception e) {
e.printStackTrace();
System.exit(-2);
}
}