Example usage for java.util Queue isEmpty

List of usage examples for java.util Queue isEmpty

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Introduction

In this page you can find the example usage for java.util Queue isEmpty.

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this collection contains no elements.

Usage

From source file:org.jboss.qa.brms.performance.examples.projectjobscheduling.domain.solver.PredecessorsDoneDateUpdatingVariableListener.java

protected void updateAllocation(ScoreDirector scoreDirector, Allocation originalAllocation) {
    Queue<Allocation> uncheckedSuccessorQueue = new ArrayDeque<Allocation>();
    uncheckedSuccessorQueue.addAll(originalAllocation.getSuccessorAllocationList());
    while (!uncheckedSuccessorQueue.isEmpty()) {
        Allocation allocation = uncheckedSuccessorQueue.remove();
        boolean updated = updatePredecessorsDoneDate(scoreDirector, allocation);
        if (updated) {
            uncheckedSuccessorQueue.addAll(allocation.getSuccessorAllocationList());
        }//from  w  ww .j  ava 2  s .c  o m
    }
}

From source file:org.ros.internal.message.new_style.ServiceLoader.java

private void findMessages(File searchPath) {
    CharsetDecoder decoder = Charset.forName("US-ASCII").newDecoder();
    FindServicesFilter filter = new FindServicesFilter();
    Queue<File> childPaths = Lists.newLinkedList();
    childPaths.addAll(listPathEntries(searchPath, filter));
    while (!childPaths.isEmpty()) {
        File servicePath = childPaths.poll();
        if (servicePath.isDirectory()) {
            childPaths.addAll(listPathEntries(servicePath, filter));
        } else {//from w w w.j  a  v  a2  s  . c o m
            try {
                addServiceDefinitionFromPaths(searchPath, servicePath, decoder);
            } catch (IOException e) {
                log.error("Failed to read service: " + servicePath.getAbsolutePath(), e);
            }
        }
    }
}

From source file:org.jasig.cas.web.StatisticsController.java

/**
 * Calculates the up time.//from w  w  w.j  av  a2  s.c  o  m
 *
 * @param difference the difference
 * @param calculations the calculations
 * @param labels the labels
 * @return the uptime as a string.
 */
protected String calculateUptime(final double difference, final Queue<Integer> calculations,
        final Queue<String> labels) {
    if (calculations.isEmpty()) {
        return "";
    }

    final int value = calculations.remove();
    final double time = Math.floor(difference / value);
    final double newDifference = difference - time * value;
    final String currentLabel = labels.remove();
    final String label = time == 0 || time > 1 ? currentLabel + "s" : currentLabel;

    return Integer.toString((int) time) + " " + label + " "
            + calculateUptime(newDifference, calculations, labels);
}

From source file:org.ros.internal.message.new_style.MessageLoader.java

private void findMessages(File searchPath) {
    CharsetDecoder decoder = Charset.forName("US-ASCII").newDecoder();
    FindMessagesFilter filter = new FindMessagesFilter();
    Queue<File> childPaths = Lists.newLinkedList();
    childPaths.addAll(listPathEntries(searchPath, filter));
    while (!childPaths.isEmpty()) {
        File messagePath = childPaths.poll();
        if (messagePath.isDirectory()) {
            childPaths.addAll(listPathEntries(messagePath, filter));
        } else {/*from   www  . j  a  v  a  2 s .c  o m*/
            try {
                addMessageDefinitionFromPaths(searchPath, messagePath, decoder);
            } catch (IOException e) {
                log.error("Failed to read message: " + messagePath.getAbsolutePath(), e);
            }
        }
    }
}

From source file:org.jboss.qa.phaser.Executor.java

public void execute() throws Exception {
    final List<ErrorReport> throwAtEnd = new LinkedList<>();
    invokeJobMethods(BeforeJob.class);

    final Queue<ExecutionNode> nodeQueue = new LinkedList<>(roots);
    boolean finalizeState = false;
    while (!nodeQueue.isEmpty()) {
        final ExecutionNode node = nodeQueue.poll();

        final ExecutionError err = node.execute(finalizeState);

        if (err != null) {
            final ExceptionHandling eh = err.getExceptionHandling();
            final ErrorReport errorReport = new ErrorReport("Exception thrown by phase execution:",
                    err.getThrowable());
            switch (eh.getReport()) {
            case THROW_AT_END:
                throwAtEnd.add(errorReport);
                break;
            case LOG:
                ErrorReporter.report(errorReport);
                break;
            default:
                log.debug("Exception by phase execution, continue.");
            }/*  www.  j  a  va2 s  .co  m*/

            if (eh.getExecution() == ExceptionHandling.Execution.IMMEDIATELY_STOP) {
                break;
            } else if (eh.getExecution() == ExceptionHandling.Execution.FINALIZE) {
                finalizeState = true;
            }
        }
        nodeQueue.addAll(node.getChildNodes());
    }

    invokeJobMethods(AfterJob.class);
    ErrorReporter.finalErrorReport(throwAtEnd);
}

From source file:geotag.example.sbickt.SbicktAPITest.java

@Test
public void testDeleteGeoTag() {
    Queue<GeoTag> listOfGeoTags = new LinkedList<GeoTag>();

    try {//from  www .jav a2  s .  c om
        listOfGeoTags = SbicktAPI.getGeoTags(new Point3D(2.548, 2.548, 0));

        while (!listOfGeoTags.isEmpty()) {
            SbicktAPI.deleteGeoTag(listOfGeoTags.poll().getId());
        }
    } catch (Exception e) {
        fail(e.toString());
    }
}

From source file:org.jasig.cas.web.report.StatisticsController.java

/**
 * Calculates the up time.//from   w  w w . j av a 2 s . c o  m
 *
 * @param difference the difference
 * @param calculations the calculations
 * @param labels the labels
 * @return the uptime as a string.
 */
protected String calculateUptime(final double difference, final Queue<Integer> calculations,
        final Queue<String> labels) {
    if (calculations.isEmpty()) {
        return "";
    }

    final int value = calculations.remove();
    final double time = Math.floor(difference / value);
    final double newDifference = difference - time * value;
    final String currentLabel = labels.remove();
    final String label = time == 0 || time > 1 ? currentLabel + 's' : currentLabel;

    return Integer.toString((int) time) + ' ' + label + ' '
            + calculateUptime(newDifference, calculations, labels);
}

From source file:org.apache.http.client.protocol.RequestAuthenticationBase.java

void process(final AuthState authState, final HttpRequest request, final HttpContext context) {
    AuthScheme authScheme = authState.getAuthScheme();
    Credentials creds = authState.getCredentials();
    switch (authState.getState()) {
    case FAILURE:
        return;/*from   w ww .  j  a v a 2  s.  c  om*/
    case SUCCESS:
        ensureAuthScheme(authScheme);
        if (authScheme.isConnectionBased()) {
            return;
        }
        break;
    case CHALLENGED:
        final Queue<AuthOption> authOptions = authState.getAuthOptions();
        if (authOptions != null) {
            while (!authOptions.isEmpty()) {
                final AuthOption authOption = authOptions.remove();
                authScheme = authOption.getAuthScheme();
                creds = authOption.getCredentials();
                authState.update(authScheme, creds);
                if (this.log.isDebugEnabled()) {
                    this.log.debug("Generating response to an authentication challenge using "
                            + authScheme.getSchemeName() + " scheme");
                }
                try {
                    final Header header = authenticate(authScheme, creds, request, context);
                    request.addHeader(header);
                    break;
                } catch (final AuthenticationException ex) {
                    if (this.log.isWarnEnabled()) {
                        this.log.warn(authScheme + " authentication error: " + ex.getMessage());
                    }
                }
            }
            return;
        } else {
            ensureAuthScheme(authScheme);
        }
    }
    if (authScheme != null) {
        try {
            final Header header = authenticate(authScheme, creds, request, context);
            request.addHeader(header);
        } catch (final AuthenticationException ex) {
            if (this.log.isErrorEnabled()) {
                this.log.error(authScheme + " authentication error: " + ex.getMessage());
            }
        }
    }
}

From source file:org.apache.hadoop.hbase.chaos.actions.RollingBatchRestartRsAction.java

@Override
public void perform() throws Exception {
    LOG.info(String.format("Performing action: Rolling batch restarting %d%% of region servers",
            (int) (ratio * 100)));
    List<ServerName> selectedServers = PolicyBasedChaosMonkey.selectRandomItems(getCurrentServers(), ratio);

    Queue<ServerName> serversToBeKilled = new LinkedList<ServerName>(selectedServers);
    Queue<ServerName> deadServers = new LinkedList<ServerName>();

    ////  w  w w  . j  a v  a  2 s. c o  m
    while (!serversToBeKilled.isEmpty() || !deadServers.isEmpty()) {
        boolean action = true; //action true = kill server, false = start server

        if (serversToBeKilled.isEmpty() || deadServers.isEmpty()) {
            action = deadServers.isEmpty();
        } else {
            action = RandomUtils.nextBoolean();
        }

        if (action) {
            ServerName server = serversToBeKilled.remove();
            try {
                killRs(server);
            } catch (org.apache.hadoop.util.Shell.ExitCodeException e) {
                // We've seen this in test runs where we timeout but the kill went through. HBASE-9743
                // So, add to deadServers even if exception so the start gets called.
                LOG.info("Problem killing but presume successful; code=" + e.getExitCode(), e);
            }
            deadServers.add(server);
        } else {
            try {
                ServerName server = deadServers.remove();
                startRs(server);
            } catch (org.apache.hadoop.util.Shell.ExitCodeException e) {
                // The start may fail but better to just keep going though we may lose server.
                //
                LOG.info("Problem starting, will retry; code=" + e.getExitCode(), e);
            }
        }

        sleep(RandomUtils.nextInt((int) sleepTime));
    }
}

From source file:org.apache.http2.client.protocol.RequestAuthenticationBase.java

void process(final AuthState authState, final HttpRequest request, final HttpContext context)
        throws HttpException, IOException {
    AuthScheme authScheme = authState.getAuthScheme();
    Credentials creds = authState.getCredentials();
    switch (authState.getState()) {
    case FAILURE:
        return;//from w  w w .  ja v a  2  s  . c  om
    case SUCCESS:
        ensureAuthScheme(authScheme);
        if (authScheme.isConnectionBased()) {
            return;
        }
        break;
    case CHALLENGED:
        Queue<AuthOption> authOptions = authState.getAuthOptions();
        if (authOptions != null) {
            while (!authOptions.isEmpty()) {
                AuthOption authOption = authOptions.remove();
                authScheme = authOption.getAuthScheme();
                creds = authOption.getCredentials();
                authState.update(authScheme, creds);
                if (this.log.isDebugEnabled()) {
                    this.log.debug("Generating response to an authentication challenge using "
                            + authScheme.getSchemeName() + " scheme");
                }
                try {
                    Header header = authenticate(authScheme, creds, request, context);
                    request.addHeader(header);
                    break;
                } catch (AuthenticationException ex) {
                    if (this.log.isWarnEnabled()) {
                        this.log.warn(authScheme + " authentication error: " + ex.getMessage());
                    }
                }
            }
            return;
        } else {
            ensureAuthScheme(authScheme);
        }
    }
    if (authScheme != null) {
        try {
            Header header = authenticate(authScheme, creds, request, context);
            request.addHeader(header);
        } catch (AuthenticationException ex) {
            if (this.log.isErrorEnabled()) {
                this.log.error(authScheme + " authentication error: " + ex.getMessage());
            }
        }
    }
}