Examples with TimeoutTracker org.opennms.core.utils.TimeoutTracker used on opensource projects

Example 6 with TimeoutTracker

use of org.opennms.core.utils.TimeoutTracker in project opennms by OpenNMS.

the class SmtpMonitor method poll.

/**
     * {@inheritDoc}
     *
     * <P>
     * Poll the specified address for SMTP service availability.
     * </P>
     *
     * <P>
     * During the poll an attempt is made to connect on the specified port (by
     * default TCP port 25). If the connection request is successful, the banner
     * line generated by the interface is parsed and if the extracted return
     * code indicates that we are talking to an SMTP server we continue. Next,
     * an SMTP 'HELO' command is sent to the interface. Again the response is
     * parsed and a return code extracted and verified. Finally, an SMTP 'QUIT'
     * command is sent. Provided that the interface's response is valid we set
     * the service status to SERVICE_AVAILABLE and return.
     * </P>
     */
@Override
public PollStatus poll(MonitoredService svc, Map<String, Object> parameters) {
    TimeoutTracker tracker = new TimeoutTracker(parameters, DEFAULT_RETRY, DEFAULT_TIMEOUT);
    int port = ParameterMap.getKeyedInteger(parameters, "port", DEFAULT_PORT);
    InetAddress ipAddr = svc.getAddress();
    final String hostAddress = InetAddressUtils.str(ipAddr);
    LOG.debug("poll: address = {}, port = {}, {}", hostAddress, port, tracker);
    PollStatus serviceStatus = PollStatus.unavailable();
    for (tracker.reset(); tracker.shouldRetry() && !serviceStatus.isAvailable(); tracker.nextAttempt()) {
        Socket socket = null;
        try {
            // create a connected socket
            //
            tracker.startAttempt();
            socket = new Socket();
            socket.connect(new InetSocketAddress(ipAddr, port), tracker.getConnectionTimeout());
            socket.setSoTimeout(tracker.getSoTimeout());
            LOG.debug("SmtpMonitor: connected to host: {} on port: {}", ipAddr, port);
            // We're connected, so upgrade status to unresponsive
            serviceStatus = PollStatus.unresponsive();
            // Forcing to check for CRLF instead of any other line terminator as per RFC specification
            CRLFLineReader rdr = new CRLFLineReader(new InputStreamReader(socket.getInputStream(), "ASCII"));
            //
            // Tokenize the Banner Line, and check the first
            // line for a valid return.
            //
            String banner = sendMessage(socket, rdr, null);
            LOG.debug("poll: banner = {}", banner);
            StringTokenizer t = new StringTokenizer(banner);
            int rc = Integer.parseInt(t.nextToken());
            if (rc == 220) {
                //
                // Send the HELO command
                //
                String cmd = "HELO " + LOCALHOST_NAME + "\r\n";
                socket.getOutputStream().write(cmd.getBytes());
                //
                // get the returned string, tokenize, and
                // verify the correct output.
                //
                String response = rdr.readLine();
                double responseTime = tracker.elapsedTimeInMillis();
                if (response == null) {
                    continue;
                }
                if (MULTILINE.matcher(response).find()) {
                    // Ok we have a multi-line response...first three
                    // chars of the response line are the return code.
                    // The last line of the response will start with
                    // return code followed by a space.
                    String multiLineRC = new String(response.getBytes("ASCII"), 0, 3, "ASCII");
                    // Create new regExp to look for last line
                    // of this multi line response
                    Pattern endMultiline = null;
                    try {
                        endMultiline = Pattern.compile(multiLineRC);
                    } catch (PatternSyntaxException ex) {
                        throw new java.lang.reflect.UndeclaredThrowableException(ex);
                    }
                    // response
                    do {
                        response = rdr.readLine();
                    } while (response != null && !endMultiline.matcher(response).find());
                    if (response == null) {
                        continue;
                    }
                }
                t = new StringTokenizer(response);
                rc = Integer.parseInt(t.nextToken());
                if (rc == 250) {
                    response = sendMessage(socket, rdr, "QUIT\r\n");
                    t = new StringTokenizer(response);
                    rc = Integer.parseInt(t.nextToken());
                    if (rc == 221) {
                        serviceStatus = PollStatus.available(responseTime);
                    }
                }
            } else if (rc == 554) {
                String response = sendMessage(socket, rdr, "QUIT\r\n");
                serviceStatus = PollStatus.unavailable("Server rejecting transactions with 554");
            }
            // checking or HELO/QUIT comand process.
            if (!serviceStatus.isAvailable()) {
                serviceStatus = PollStatus.unavailable(serviceStatus.getReason());
            }
        } catch (NumberFormatException e) {
            String reason = "NumberFormatException while polling address " + hostAddress;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (NoRouteToHostException e) {
            String reason = "No route to host exception for address " + hostAddress;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
            // Break out of for(;;)
            break;
        } catch (InterruptedIOException e) {
            String reason = "Did not receive expected response within timeout " + tracker;
            LOG.debug(reason);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (ConnectException e) {
            String reason = "Unable to connect to address " + hostAddress;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (IOException e) {
            String reason = "IOException while polling address " + hostAddress;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } finally {
            try {
                // Close the socket
                if (socket != null) {
                    socket.close();
                }
            } catch (IOException e) {
                e.fillInStackTrace();
                LOG.debug("poll: Error closing socket.", e);
            }
        }
    }
    //
    return serviceStatus;
}

Example 7 with TimeoutTracker

use of org.opennms.core.utils.TimeoutTracker in project opennms by OpenNMS.

the class SnmpMonitor method poll.

/**
     * {@inheritDoc}
     *
     * <P>
     * The poll() method is responsible for polling the specified address for
     * SNMP service availability.
     * </P>
     * @exception RuntimeException
     *                Thrown for any unrecoverable errors.
     */
@Override
public PollStatus poll(MonitoredService svc, Map<String, Object> parameters) {
    PollStatus status = PollStatus.unavailable();
    InetAddress ipaddr = svc.getAddress();
    // Retrieve this interface's SNMP peer object
    //
    final SnmpAgentConfig agentConfig = getAgentConfig(svc, parameters);
    final String hostAddress = InetAddressUtils.str(ipaddr);
    // Get configuration parameters
    //
    String oid = ParameterMap.getKeyedString(parameters, "oid", DEFAULT_OBJECT_IDENTIFIER);
    String operator = ParameterMap.getKeyedString(parameters, "operator", null);
    String operand = ParameterMap.getKeyedString(parameters, "operand", null);
    String walkstr = ParameterMap.getKeyedString(parameters, "walk", "false");
    String matchstr = ParameterMap.getKeyedString(parameters, "match-all", "true");
    int countMin = ParameterMap.getKeyedInteger(parameters, "minimum", 0);
    int countMax = ParameterMap.getKeyedInteger(parameters, "maximum", 0);
    String reasonTemplate = ParameterMap.getKeyedString(parameters, "reason-template", DEFAULT_REASON_TEMPLATE);
    String hexstr = ParameterMap.getKeyedString(parameters, "hex", "false");
    hex = "true".equalsIgnoreCase(hexstr);
    // set timeout and retries on SNMP peer object
    //
    agentConfig.setTimeout(ParameterMap.getKeyedInteger(parameters, "timeout", agentConfig.getTimeout()));
    agentConfig.setRetries(ParameterMap.getKeyedInteger(parameters, "retry", ParameterMap.getKeyedInteger(parameters, "retries", agentConfig.getRetries())));
    agentConfig.setPort(ParameterMap.getKeyedInteger(parameters, "port", agentConfig.getPort()));
    // Squirrel the configuration parameters away in a Properties for later expansion if service is down
    Properties svcParams = new Properties();
    svcParams.setProperty("oid", oid);
    svcParams.setProperty("operator", String.valueOf(operator));
    svcParams.setProperty("operand", String.valueOf(operand));
    svcParams.setProperty("walk", walkstr);
    svcParams.setProperty("matchAll", matchstr);
    svcParams.setProperty("minimum", String.valueOf(countMin));
    svcParams.setProperty("maximum", String.valueOf(countMax));
    svcParams.setProperty("timeout", String.valueOf(agentConfig.getTimeout()));
    svcParams.setProperty("retry", String.valueOf(agentConfig.getRetries()));
    svcParams.setProperty("retries", svcParams.getProperty("retry"));
    svcParams.setProperty("ipaddr", hostAddress);
    svcParams.setProperty("port", String.valueOf(agentConfig.getPort()));
    svcParams.setProperty("hex", hexstr);
    //
    try {
        TimeoutTracker tracker = new TimeoutTracker(parameters, agentConfig.getRetries(), agentConfig.getTimeout());
        tracker.reset();
        tracker.startAttempt();
        SnmpObjId snmpObjectId = SnmpObjId.get(oid);
        // the parameter "matchall" to "count" will act as if "walk" has been set to "true".
        if ("count".equals(matchstr)) {
            if (DEFAULT_REASON_TEMPLATE.equals(reasonTemplate)) {
                reasonTemplate = "Value: ${matchCount} outside of range Min: ${minimum} to Max: ${maximum}";
            }
            int matchCount = 0;
            List<SnmpValue> results = SnmpUtils.getColumns(agentConfig, "snmpPoller", snmpObjectId);
            for (SnmpValue result : results) {
                if (result != null) {
                    LOG.debug("poll: SNMPwalk poll succeeded, addr={} oid={} value={}", hostAddress, oid, result);
                    if (meetsCriteria(result, operator, operand)) {
                        matchCount++;
                    }
                }
            }
            svcParams.setProperty("matchCount", String.valueOf(matchCount));
            LOG.debug("poll: SNMPwalk count succeeded, total={} min={} max={}", matchCount, countMin, countMax);
            if ((countMin <= matchCount) && (matchCount <= countMax)) {
                status = PollStatus.available(tracker.elapsedTimeInMillis());
            } else {
                String reason = PropertiesUtils.substitute(reasonTemplate, svcParams);
                LOG.debug(reason);
                status = PollStatus.unavailable(reason);
                return status;
            }
        } else if ("true".equals(walkstr)) {
            if (DEFAULT_REASON_TEMPLATE.equals(reasonTemplate)) {
                reasonTemplate = "SNMP poll failed, addr=${ipaddr} oid=${oid}";
            }
            List<SnmpValue> results = SnmpUtils.getColumns(agentConfig, "snmpPoller", snmpObjectId);
            for (SnmpValue result : results) {
                if (result != null) {
                    svcParams.setProperty("observedValue", getStringValue(result));
                    if (meetsCriteria(result, operator, operand)) {
                        status = PollStatus.available(tracker.elapsedTimeInMillis());
                        if ("false".equals(matchstr)) {
                            return status;
                        }
                    } else if ("true".equals(matchstr)) {
                        String reason = PropertiesUtils.substitute(reasonTemplate, svcParams);
                        LOG.debug(reason);
                        status = PollStatus.unavailable(reason);
                        return status;
                    }
                }
            }
        } else {
            if (DEFAULT_REASON_TEMPLATE.equals(reasonTemplate)) {
                if (operator != null) {
                    reasonTemplate = "Observed value '${observedValue}' does not meet criteria '${operator} ${operand}'";
                } else {
                    reasonTemplate = "Observed value '${observedValue}' was null";
                }
            }
            SnmpValue result = SnmpUtils.get(agentConfig, snmpObjectId);
            if (result != null) {
                svcParams.setProperty("observedValue", getStringValue(result));
                LOG.debug("poll: SNMP poll succeeded, addr={} oid={} value={}", hostAddress, oid, result);
                if (meetsCriteria(result, operator, operand)) {
                    status = PollStatus.available(tracker.elapsedTimeInMillis());
                } else {
                    status = PollStatus.unavailable(PropertiesUtils.substitute(reasonTemplate, svcParams));
                }
            } else {
                String reason = "SNMP poll failed, addr=" + hostAddress + " oid=" + oid;
                LOG.debug(reason);
                status = PollStatus.unavailable(reason);
            }
        }
    } catch (NumberFormatException e) {
        String reason = "Number operator used on a non-number " + e.getMessage();
        LOG.debug(reason);
        status = PollStatus.unavailable(reason);
    } catch (IllegalArgumentException e) {
        String reason = "Invalid SNMP Criteria: " + e.getMessage();
        LOG.debug(reason);
        status = PollStatus.unavailable(reason);
    } catch (Throwable t) {
        String reason = "Unexpected exception during SNMP poll of interface " + hostAddress;
        LOG.debug(reason, t);
        status = PollStatus.unavailable(reason);
    }
    return status;
}

Example 8 with TimeoutTracker

use of org.opennms.core.utils.TimeoutTracker in project opennms by OpenNMS.

the class SSLCertMonitor method poll.

/**
     * {@inheritDoc}
     *
     * Poll the specified address for HTTP service availability.
     *
     * During the poll an attempt is made to connect on the specified port. If
     * the connection request is successful, check the X509Certificates provided
     * by our peer and check that our time is between the certificates start and
     * end time.
     * Provided that the interface's response is valid we set the service status to
     * SERVICE_AVAILABLE and return.
     */
@Override
public PollStatus poll(final MonitoredService svc, final Map<String, Object> parameters) {
    TimeoutTracker tracker = new TimeoutTracker(parameters, DEFAULT_RETRY, DEFAULT_TIMEOUT);
    // Port
    int port = ParameterMap.getKeyedInteger(parameters, PARAMETER_PORT, DEFAULT_PORT);
    if (port == DEFAULT_PORT) {
        throw new RuntimeException("Required parameter 'port' is not present in supplied properties.");
    }
    // Remaining days
    int validityDays = ParameterMap.getKeyedInteger(parameters, PARAMETER_DAYS, DEFAULT_DAYS);
    if (validityDays <= 0) {
        throw new RuntimeException("Required parameter 'days' must be a positive value.");
    }
    // Server name (optional)
    final String serverName = PropertiesUtils.substitute(ParameterMap.getKeyedString(parameters, PARAMETER_SERVER_NAME, ""), getServiceProperties(svc));
    // Calculate validity range
    Calendar calValid = this.getCalendarInstance();
    Calendar calCurrent = this.getCalendarInstance();
    calValid.setTimeInMillis(calCurrent.getTimeInMillis());
    calValid.add(Calendar.DAY_OF_MONTH, validityDays);
    Calendar calBefore = this.getCalendarInstance();
    Calendar calAfter = this.getCalendarInstance();
    // Get the address instance
    InetAddress ipAddr = svc.getAddress();
    final String hostAddress = InetAddressUtils.str(ipAddr);
    LOG.debug("poll: address={}, port={}, serverName={}, {}", hostAddress, port, serverName, tracker);
    // Give it a whirl
    PollStatus serviceStatus = PollStatus.unavailable();
    for (tracker.reset(); tracker.shouldRetry() && !serviceStatus.isAvailable(); tracker.nextAttempt()) {
        Socket socket = null;
        try {
            tracker.startAttempt();
            socket = new Socket();
            socket.connect(new InetSocketAddress(ipAddr, port), tracker.getConnectionTimeout());
            socket.setSoTimeout(tracker.getSoTimeout());
            LOG.debug("Connected to host: {} on port: {}", ipAddr, port);
            SSLSocket sslSocket = SocketUtils.wrapSocketInSslContext(socket, null, null);
            // We're connected, so upgrade status to unresponsive
            serviceStatus = PollStatus.unresponsive();
            // Use the server name as as SNI host name if available
            if (!Strings.isNullOrEmpty(serverName)) {
                final SSLParameters sslParameters = sslSocket.getSSLParameters();
                sslParameters.setServerNames(ImmutableList.of(new SNIHostName(serverName)));
                sslSocket.setSSLParameters(sslParameters);
                // Check certificates host name
                if (!new StrictHostnameVerifier().verify(serverName, sslSocket.getSession())) {
                    serviceStatus = PollStatus.unavailable("Host name verification failed - certificate common name is invalid");
                    continue;
                }
            }
            Certificate[] certs = sslSocket.getSession().getPeerCertificates();
            for (int i = 0; i < certs.length && !serviceStatus.isAvailable(); i++) {
                if (certs[i] instanceof X509Certificate) {
                    X509Certificate certx = (X509Certificate) certs[i];
                    LOG.debug("Checking validity against dates: [current: {}, valid: {}], NotBefore: {}, NotAfter: {}", calCurrent.getTime(), calValid.getTime(), certx.getNotBefore(), certx.getNotAfter());
                    calBefore.setTime(certx.getNotBefore());
                    calAfter.setTime(certx.getNotAfter());
                    if (calCurrent.before(calBefore)) {
                        LOG.debug("Certificate is invalid, current time is before start time");
                        serviceStatus = PollStatus.unavailable("Certificate is invalid, current time is before start time");
                        break;
                    } else if (calCurrent.before(calAfter)) {
                        if (calValid.before(calAfter)) {
                            LOG.debug("Certificate is valid, and does not expire before validity check date");
                            serviceStatus = PollStatus.available(tracker.elapsedTimeInMillis());
                            break;
                        } else {
                            String reason = "Certificate is valid, but will expire in " + validityDays + " days.";
                            LOG.debug(reason);
                            serviceStatus = PollStatus.unavailable(reason);
                            break;
                        }
                    } else {
                        LOG.debug("Certificate has expired.");
                        serviceStatus = PollStatus.unavailable("Certificate has expired.");
                        break;
                    }
                }
            }
        } catch (NoRouteToHostException e) {
            String reason = "No route to host exception for address " + hostAddress;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
            // Break out of for(;;)
            break;
        } catch (InterruptedIOException e) {
            String reason = "did not connect to host with " + tracker;
            LOG.debug(reason);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (ConnectException e) {
            String reason = "Connection exception for address: " + ipAddr;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } catch (IOException e) {
            String reason = "IOException while polling address: " + ipAddr;
            LOG.debug(reason, e);
            serviceStatus = PollStatus.unavailable(reason);
        } finally {
            try {
                if (socket != null) {
                    socket.close();
                }
            } catch (IOException e) {
                e.fillInStackTrace();
                LOG.debug("poll: Error closing socket.", e);
            }
        }
    }
    return serviceStatus;
}

Example 9 with TimeoutTracker

use of org.opennms.core.utils.TimeoutTracker in project opennms by OpenNMS.

the class MailTransportMonitor method readTestMessage.

private PollStatus readTestMessage(final MailTransportParameters mailParms) {
    LOG.debug("readTestMessage: Beginning read mail test.");
    PollStatus status = PollStatus.unavailable("Test not completed.");
    final long interval = mailParms.getReadTestAttemptInterval();
    if (mailParms.isEnd2EndTestInProgress()) {
        LOG.debug("Initially delaying read test: {} because end to end test is in progress.", mailParms.getReadTestAttemptInterval());
        if (delayTest(status, interval) == PollStatus.SERVICE_UNKNOWN) {
            return status;
        }
    }
    Store mailStore = null;
    Folder mailFolder = null;
    try {
        final JavaMailer readMailer = new JavaMailer(mailParms.getJavamailProperties());
        setReadMailProperties(mailParms, readMailer);
        final TimeoutTracker tracker = new TimeoutTracker(mailParms.getParameterMap(), mailParms.getRetries(), mailParms.getTimeout());
        for (tracker.reset(); tracker.shouldRetry(); tracker.nextAttempt()) {
            tracker.startAttempt();
            if (tracker.getAttempt() > 0) {
                if (delayTest(status, interval) == PollStatus.SERVICE_UNKNOWN) {
                    LOG.warn("readTestMessage: Status set to: {} during delay, exiting test.", status);
                    break;
                }
            }
            LOG.debug("readTestMessage: reading mail attempt: {}, elapsed time: {}ms.", (tracker.getAttempt() + 1), String.format("%.2f", tracker.elapsedTimeInMillis()));
            try {
                mailStore = readMailer.getSession().getStore();
                mailFolder = retrieveMailFolder(mailParms, mailStore);
                mailFolder.open(Folder.READ_WRITE);
            } catch (final MessagingException e) {
                if (tracker.shouldRetry()) {
                    LOG.warn("readTestMessage: error reading INBOX", e);
                    closeStore(mailStore, mailFolder);
                    //try again to get mail Folder from Store
                    continue;
                } else {
                    LOG.warn("readTestMessage: error reading INBOX", e);
                    return PollStatus.down(e.getLocalizedMessage());
                }
            }
            if (mailFolder.isOpen() && (mailParms.getReadTest().getSubjectMatch() != null || mailParms.isEnd2EndTestInProgress())) {
                status = processMailSubject(mailParms, mailFolder);
                if (status.getStatusCode() == PollStatus.SERVICE_AVAILABLE) {
                    break;
                }
            }
        }
    } catch (final JavaMailerException e) {
        status = PollStatus.down(e.getLocalizedMessage());
    } finally {
        closeStore(mailStore, mailFolder);
    }
    return status;
}

Example 10 with TimeoutTracker

use of org.opennms.core.utils.TimeoutTracker in project opennms by OpenNMS.

the class HostResourceSwRunMonitor method poll.

/**
     * {@inheritDoc}
     *
     * <P>
     * The poll() method is responsible for polling the specified address for
     * SNMP service availability.
     * </P>
     * @exception RuntimeException
     *                Thrown for any uncrecoverable errors.
     */
@Override
public PollStatus poll(MonitoredService svc, Map<String, Object> parameters) {
    InetAddress ipaddr = svc.getAddress();
    // Retrieve this interface's SNMP peer object
    //
    final SnmpAgentConfig agentConfig = getAgentConfig(svc, parameters);
    final String hostAddress = InetAddressUtils.str(ipaddr);
    LOG.debug("poll: setting SNMP peer attribute for interface {}", hostAddress);
    // Get configuration parameters
    //
    // This should never need to be overridden, but it can be in order to be used with similar tables.
    String serviceNameOid = ParameterMap.getKeyedString(parameters, "service-name-oid", HOSTRESOURCE_SW_NAME_OID);
    // This should never need to be overridden, but it can be in order to be used with similar tables.
    String serviceStatusOid = ParameterMap.getKeyedString(parameters, "service-status-oid", HOSTRESOURCE_SW_STATUS_OID);
    // This is the string that represents the service name to be monitored.
    String serviceName = ParameterMap.getKeyedString(parameters, "service-name", null);
    // The service name may appear in the table more than once. If this is set to true, all values must match the run level.
    String matchAll = ParameterMap.getKeyedString(parameters, "match-all", "false");
    // This is one of: 
    //                   running(1),
    //                   runnable(2),    -- waiting for resource
    //                                   -- (i.e., CPU, memory, IO)
    //                   notRunnable(3), -- loaded but waiting for event
    //                   invalid(4)      -- not loaded
    //
    // This represents the maximum run-level, i.e. 2 means either running(1) or runnable(2) pass.
    String runLevel = ParameterMap.getKeyedString(parameters, "run-level", "2");
    // If "match-all" is true, there can be an optional "min-services" and "max-services" parameters that can define a range. The service is up if:
    // a) services_count >= min-services and services_count <= max-services
    // b) either one is not defined, then only one has to pass.
    // c) neither are defined, the monitor acts just like it used to - checking all instances to see if they are all running.
    // It is assumed that all services would have to pass the minimum run state test, no matter what the count.
    int minServices = ParameterMap.getKeyedInteger(parameters, "min-services", -1);
    int maxServices = ParameterMap.getKeyedInteger(parameters, "max-services", -1);
    // set timeout and retries on SNMP peer object
    //
    agentConfig.setTimeout(ParameterMap.getKeyedInteger(parameters, "timeout", agentConfig.getTimeout()));
    agentConfig.setRetries(ParameterMap.getKeyedInteger(parameters, "retry", ParameterMap.getKeyedInteger(parameters, "retries", agentConfig.getRetries())));
    agentConfig.setPort(ParameterMap.getKeyedInteger(parameters, "port", agentConfig.getPort()));
    LOG.debug("poll: service= SNMP address= {}", agentConfig);
    PollStatus status = PollStatus.unavailable("HostResourceSwRunMonitor service not found, addr=" + hostAddress + ", service-name=" + serviceName);
    // Establish SNMP session with interface
    //
    int matches = 0;
    try {
        LOG.debug("HostResourceSwRunMonitor.poll: SnmpAgentConfig address: {}", agentConfig);
        if (serviceName == null) {
            status.setReason("HostResourceSwRunMonitor no service-name defined, addr=" + hostAddress);
            LOG.warn("HostResourceSwRunMonitor.poll: No Service Name Defined! ");
            return status;
        }
        if (minServices > 0 && maxServices > 0 && minServices >= maxServices) {
            String reason = "min-services(" + minServices + ") should be less than max-services(" + maxServices + ")";
            status.setReason("HostResourceSwRunMonitor " + reason + ", addr=" + hostAddress + ", service-name=" + serviceName);
            LOG.warn("HostResourceSwRunMonitor.poll: {}.", reason);
            return status;
        }
        // This updates two maps: one of instance and service name, and one of instance and status.
        final SnmpObjId serviceNameOidId = SnmpObjId.get(serviceNameOid);
        final SnmpObjId serviceStatusOidId = SnmpObjId.get(serviceStatusOid);
        final Map<SnmpInstId, SnmpValue> nameResults = new HashMap<SnmpInstId, SnmpValue>();
        final Map<SnmpInstId, SnmpValue> statusResults = new HashMap<SnmpInstId, SnmpValue>();
        RowCallback callback = new RowCallback() {

            @Override
            public void rowCompleted(SnmpRowResult result) {
                nameResults.put(result.getInstance(), result.getValue(serviceNameOidId));
                statusResults.put(result.getInstance(), result.getValue(serviceStatusOidId));
            }
        };
        TimeoutTracker tracker = new TimeoutTracker(parameters, agentConfig.getRetries(), agentConfig.getTimeout());
        tracker.reset();
        tracker.startAttempt();
        TableTracker tableTracker = new TableTracker(callback, serviceNameOidId, serviceStatusOidId);
        try (SnmpWalker walker = SnmpUtils.createWalker(agentConfig, "HostResourceSwRunMonitor", tableTracker)) {
            walker.start();
            walker.waitFor();
            String error = walker.getErrorMessage();
            if (error != null && !error.trim().equals("")) {
                LOG.warn(error);
                return PollStatus.unavailable(error);
            }
        }
        // Iterate over the list of running services
        for (SnmpInstId nameInstance : nameResults.keySet()) {
            final SnmpValue name = nameResults.get(nameInstance);
            final SnmpValue value = statusResults.get(nameInstance);
            // See if the service name is in the list of running services
            if (name != null && value != null && match(serviceName, StringUtils.stripExtraQuotes(name.toString()))) {
                matches++;
                LOG.debug("poll: HostResourceSwRunMonitor poll succeeded, addr={}, service-name={}, value={}", hostAddress, serviceName, nameResults.get(nameInstance));
                // Using the instance of the service, get its status and see if it meets the criteria
                if (meetsCriteria(value, "<=", runLevel)) {
                    status = PollStatus.available(tracker.elapsedTimeInMillis());
                    // If we get here, that means the service passed the criteria, if only one match is desired we exit.
                    if ("false".equals(matchAll)) {
                        return status;
                    }
                // if we get here, that means the meetsCriteria test failed. 
                } else {
                    String reason = "HostResourceSwRunMonitor poll failed, addr=" + hostAddress + ", service-name=" + serviceName + ", status=" + statusResults.get(nameInstance);
                    LOG.debug(reason);
                    status = PollStatus.unavailable(reason);
                    return status;
                }
            }
        }
        LOG.debug("poll: HostResourceSwRunMonitor the number of matches found for {} was {}", serviceName, matches);
    } catch (NumberFormatException e) {
        String reason = "Number operator used on a non-number " + e.getMessage();
        LOG.debug(reason);
        status = PollStatus.unavailable(reason);
    } catch (IllegalArgumentException e) {
        String reason = "Invalid SNMP Criteria: " + e.getMessage();
        LOG.debug(reason);
        status = PollStatus.unavailable(reason);
    } catch (Throwable t) {
        String reason = "Unexpected exception during SNMP poll of interface " + hostAddress;
        LOG.debug(reason, t);
        status = PollStatus.unavailable(reason);
    }
    // This will be executed only if match-all=true
    boolean minOk = minServices > 0 ? matches >= minServices : true;
    boolean maxOk = maxServices > 0 ? matches <= maxServices : true;
    if (!minOk && maxServices < 0) {
        // failed min-services only
        String reason = "HostResourceSwRunMonitor poll failed: service-count(" + matches + ") >= min-services(" + minServices + "), addr=" + hostAddress + ", service-name=" + serviceName;
        LOG.debug(reason);
        status = PollStatus.unavailable(reason);
    }
    if (!maxOk && minServices < 0) {
        // failed max-services only
        String reason = "HostResourceSwRunMonitor poll failed: service-count(" + matches + ") <= max-services(" + maxServices + "), addr=" + hostAddress + ", service-name=" + serviceName;
        LOG.debug(reason);
        status = PollStatus.unavailable(reason);
    }
    if ((!minOk || !maxOk) && minServices > 0 && maxServices > 0) {
        // failed both (bad range)
        String reason = "HostResourceSwRunMonitor poll failed: min-services(" + minServices + ") >= service-count(" + matches + ") <= max-services(" + maxServices + "), addr=" + hostAddress + ", service-name=" + serviceName;
        LOG.debug(reason);
        status = PollStatus.unavailable(reason);
    }
    return status;
}