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https://github.com/overcuriousity/autopsy-flatpak.git
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Refactored service monitor to perform on-demand checks when service status is unknown
This commit is contained in:
Eugene Livis
parent
f4bc81f93e
commit
c9f2863e27
@ -38,7 +38,6 @@ import org.sleuthkit.autopsy.coreutils.MessageNotifyUtil;
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import org.sleuthkit.autopsy.events.AutopsyEventPublisher;
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import org.sleuthkit.autopsy.events.MessageServiceConnectionInfo;
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import org.sleuthkit.autopsy.keywordsearchservice.KeywordSearchService;
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import org.sleuthkit.datamodel.CaseDbConnectionInfo;
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/**
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* This class periodically checks availability of collaboration resources -
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@ -61,7 +60,8 @@ public class ServicesMonitor {
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.collect(Collectors.toSet());
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/**
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* The service monitor maintains a mapping of each service to it's last status update.
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* The service monitor maintains a mapping of each service to it's last
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* status update.
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*/
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private final ConcurrentHashMap<String, String> statusByService;
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@ -77,13 +77,12 @@ public class ServicesMonitor {
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* New value is set to updated ServiceStatus, old value is null.
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*/
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REMOTE_CASE_DATABASE,
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/**
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* Property change event fired when remote keyword search service status changes.
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* New value is set to updated ServiceStatus, old value is null.
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* Property change event fired when remote keyword search service status
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* changes. New value is set to updated ServiceStatus, old value is
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* null.
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*/
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REMOTE_KEYWORD_SEARCH,
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/**
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* Property change event fired when messaging service status changes.
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* New value is set to updated ServiceStatus, old value is null.
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@ -100,11 +99,14 @@ public class ServicesMonitor {
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* Service is currently up.
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*/
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UP,
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/**
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* Service is currently down.
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*/
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DOWN
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DOWN,
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/**
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* Service status is unknown.
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*/
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UNKNOWN,
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};
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public synchronized static ServicesMonitor getInstance() {
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@ -118,10 +120,8 @@ public class ServicesMonitor {
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this.eventPublisher = new AutopsyEventPublisher();
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this.statusByService = new ConcurrentHashMap<>();
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// Services are assumed to be "UP" by default. See CrashDetectionTask class for more info.
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for (String serviceName : serviceNames) {
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this.statusByService.put(serviceName, ServiceStatus.UP.toString());
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this.statusByService.put(serviceName, ServiceStatus.UNKNOWN.toString());
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}
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/**
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@ -138,7 +138,7 @@ public class ServicesMonitor {
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* @param service Name of the service.
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* @param status Updated status for the service.
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*/
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private void setServiceStatus(String service, String status){
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private void setServiceStatus(String service, String status) {
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this.statusByService.put(service, status);
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publishServiceStatusUpdate(service, status);
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}
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@ -152,21 +152,65 @@ public class ServicesMonitor {
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*/
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public String getServiceStatus(String service) throws UnknownServiceException {
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if (service == null){
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if (service == null) {
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// TODO NbBundle.getMessage(Case.class, "Case.createCaseDir.exception.existNotDir"));
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throw new UnknownServiceException("Requested service name is null");
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}
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String status = this.statusByService.get(service);
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if (status == null){
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if (status == null) {
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// no such service
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throw new UnknownServiceException("Requested service name " + service + " is unknown");
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} else if (status.equals(ServiceStatus.UNKNOWN.toString())) {
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// status for the service is not known. This is likely because we haven't
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// checked it's status yet. Perform an on-demand check of the service status.
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status = checkServiceStatusStatus(service);
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}
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return status;
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}
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/**
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* Publish an event signifying change in service status. Event is published locally.
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* Performs on-demand check of service availability.
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*
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* @param service Name of the service.
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* @return String Status for the service.
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*/
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private String checkServiceStatusStatus(String service) {
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if (service.equals(ServiceName.REMOTE_CASE_DATABASE.toString())) {
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if (canConnectToRemoteDb()) {
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setServiceStatus(ServiceName.REMOTE_CASE_DATABASE.toString(), ServiceStatus.UP.toString());
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return ServiceStatus.UP.toString();
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} else {
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setServiceStatus(ServiceName.REMOTE_CASE_DATABASE.toString(), ServiceStatus.DOWN.toString());
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return ServiceStatus.DOWN.toString();
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}
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} else if (service.equals(ServiceName.REMOTE_KEYWORD_SEARCH.toString())){
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KeywordSearchService kwsService = Lookup.getDefault().lookup(KeywordSearchService.class);
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// TODO - do I need to check for kwsService == null?
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if (kwsService.canConnectToRemoteSolrServer()) {
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setServiceStatus(ServiceName.REMOTE_KEYWORD_SEARCH.toString(), ServiceStatus.UP.toString());
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return ServiceStatus.UP.toString();
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} else {
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setServiceStatus(ServiceName.REMOTE_KEYWORD_SEARCH.toString(), ServiceStatus.DOWN.toString());
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return ServiceStatus.DOWN.toString();
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}
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} else if (service.equals(ServiceName.MESSAGING.toString())) {
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if (canConnectToMessagingService()) {
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setServiceStatus(ServiceName.MESSAGING.toString(), ServiceStatus.UP.toString());
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return ServiceStatus.UP.toString();
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} else {
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setServiceStatus(ServiceName.MESSAGING.toString(), ServiceStatus.DOWN.toString());
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return ServiceStatus.DOWN.toString();
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}
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}
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return ServiceStatus.UNKNOWN.toString();
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}
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/**
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* Publish an event signifying change in service status. Event is published
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* locally.
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*
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* @param service Name of the service.
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* @param status Updated status for the event.
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@ -246,20 +290,41 @@ public class ServicesMonitor {
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eventPublisher.removeSubscriber(serviceNames, subscriber);
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}
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/**
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* Verifies connection to remote database.
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*
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* @return True if connection can be established, false otherwise.
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*/
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private boolean canConnectToRemoteDb() {
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return UserPreferences.getDatabaseConnectionInfo().canConnect();
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}
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/**
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* Verifies connection to messaging service.
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*
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* @return True if connection can be established, false otherwise.
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*/
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private boolean canConnectToMessagingService() {
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MessageServiceConnectionInfo msgInfo = UserPreferences.getMessageServiceConnectionInfo();
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try {
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ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(msgInfo.getUserName(), msgInfo.getPassword(), msgInfo.getURI());
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Connection connection = connectionFactory.createConnection();
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connection.start();
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connection.close();
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return true;
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} catch (URISyntaxException | JMSException ex) {
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return false;
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}
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}
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/**
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* A Runnable task that periodically checks the availability of
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* collaboration resources (PostgreSQL server, Solr server, Active MQ
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* collaboration resources (remote database, remote keyword search service,
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* message broker) and reports status to the user in case of a gap in
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* service.
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*/
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private final class CrashDetectionTask implements Runnable {
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// Services are assumed to be "UP" by default. Change default value in ServicesMonitor()
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// constructor if this assumption changes.
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private boolean dbServerIsRunning = true;
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private boolean solrServerIsRunning = true;
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private boolean messageServerIsRunning = true;
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private final Object lock = new Object();
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/**
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@ -268,60 +333,53 @@ public class ServicesMonitor {
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@Override
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public void run() {
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synchronized (lock) {
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CaseDbConnectionInfo dbInfo = UserPreferences.getDatabaseConnectionInfo();
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if (dbInfo.canConnect()) {
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if (!dbServerIsRunning) {
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dbServerIsRunning = true;
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logger.log(Level.INFO, "Connection to PostgreSQL server restored"); //NON-NLS
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MessageNotifyUtil.Notify.info(NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.restoredService.notify.title"), NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.restoredDbService.notify.msg"));
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setServiceStatus(ServiceName.REMOTE_CASE_DATABASE.toString(), ServiceStatus.UP.toString());
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}
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} else {
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if (dbServerIsRunning) {
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dbServerIsRunning = false;
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logger.log(Level.SEVERE, "Failed to connect to PostgreSQL server"); //NON-NLS
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MessageNotifyUtil.Notify.error(NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.failedService.notify.title"), NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.failedDbService.notify.msg"));
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setServiceStatus(ServiceName.REMOTE_CASE_DATABASE.toString(), ServiceStatus.DOWN.toString());
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}
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}
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KeywordSearchService kwsService = Lookup.getDefault().lookup(KeywordSearchService.class);
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// TODO - do I need to check for kwsService == null?
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if (kwsService.canConnectToRemoteSolrServer()) {
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if (!solrServerIsRunning) {
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solrServerIsRunning = true;
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logger.log(Level.INFO, "Connection to Solr server restored"); //NON-NLS
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MessageNotifyUtil.Notify.info(NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.restoredService.notify.title"), NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.restoredSolrService.notify.msg"));
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setServiceStatus(ServiceName.REMOTE_KEYWORD_SEARCH.toString(), ServiceStatus.UP.toString());
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}
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} else {
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if (solrServerIsRunning) {
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solrServerIsRunning = false;
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logger.log(Level.SEVERE, "Failed to connect to Solr server"); //NON-NLS
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MessageNotifyUtil.Notify.error(NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.failedService.notify.title"), NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.failedSolrService.notify.msg"));
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setServiceStatus(ServiceName.REMOTE_KEYWORD_SEARCH.toString(), ServiceStatus.DOWN.toString());
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}
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}
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MessageServiceConnectionInfo msgInfo = UserPreferences.getMessageServiceConnectionInfo();
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try {
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ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(msgInfo.getUserName(), msgInfo.getPassword(), msgInfo.getURI());
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Connection connection = connectionFactory.createConnection();
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connection.start();
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connection.close();
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if (!messageServerIsRunning) {
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messageServerIsRunning = true;
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logger.log(Level.INFO, "Connection to ActiveMQ server restored"); //NON-NLS
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MessageNotifyUtil.Notify.info(NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.restoredService.notify.title"), NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.restoredMessageService.notify.msg"));
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setServiceStatus(ServiceName.MESSAGING.toString(), ServiceStatus.UP.toString());
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if (canConnectToRemoteDb()) {
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if (!getServiceStatus(ServiceName.REMOTE_CASE_DATABASE.toString()).equals(ServiceStatus.UP.toString())) {
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logger.log(Level.INFO, "Connection to PostgreSQL server restored"); //NON-NLS
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MessageNotifyUtil.Notify.info(NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.restoredService.notify.title"), NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.restoredDbService.notify.msg"));
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setServiceStatus(ServiceName.REMOTE_CASE_DATABASE.toString(), ServiceStatus.UP.toString());
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}
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} else {
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if (!getServiceStatus(ServiceName.REMOTE_CASE_DATABASE.toString()).equals(ServiceStatus.DOWN.toString())) {
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logger.log(Level.SEVERE, "Failed to connect to PostgreSQL server"); //NON-NLS
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MessageNotifyUtil.Notify.error(NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.failedService.notify.title"), NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.failedDbService.notify.msg"));
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setServiceStatus(ServiceName.REMOTE_CASE_DATABASE.toString(), ServiceStatus.DOWN.toString());
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}
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}
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} catch (URISyntaxException | JMSException ex) {
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if (messageServerIsRunning) {
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messageServerIsRunning = false;
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logger.log(Level.SEVERE, "Failed to connect to ActiveMQ server", ex); //NON-NLS
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MessageNotifyUtil.Notify.error(NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.failedService.notify.title"), NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.failedMessageService.notify.msg"));
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setServiceStatus(ServiceName.MESSAGING.toString(), ServiceStatus.DOWN.toString());
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KeywordSearchService kwsService = Lookup.getDefault().lookup(KeywordSearchService.class);
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// TODO - do I need to check for kwsService == null?
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if (kwsService.canConnectToRemoteSolrServer()) {
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if (!getServiceStatus(ServiceName.REMOTE_KEYWORD_SEARCH.toString()).equals(ServiceStatus.UP.toString())) {
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logger.log(Level.INFO, "Connection to Solr server restored"); //NON-NLS
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MessageNotifyUtil.Notify.info(NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.restoredService.notify.title"), NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.restoredSolrService.notify.msg"));
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setServiceStatus(ServiceName.REMOTE_KEYWORD_SEARCH.toString(), ServiceStatus.UP.toString());
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}
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} else {
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if (!getServiceStatus(ServiceName.REMOTE_KEYWORD_SEARCH.toString()).equals(ServiceStatus.DOWN.toString())) {
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logger.log(Level.SEVERE, "Failed to connect to Solr server"); //NON-NLS
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MessageNotifyUtil.Notify.error(NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.failedService.notify.title"), NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.failedSolrService.notify.msg"));
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setServiceStatus(ServiceName.REMOTE_KEYWORD_SEARCH.toString(), ServiceStatus.DOWN.toString());
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}
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}
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if (canConnectToMessagingService()) {
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if (!getServiceStatus(ServiceName.MESSAGING.toString()).equals(ServiceStatus.UP.toString())) {
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logger.log(Level.INFO, "Connection to ActiveMQ server restored"); //NON-NLS
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MessageNotifyUtil.Notify.info(NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.restoredService.notify.title"), NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.restoredMessageService.notify.msg"));
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setServiceStatus(ServiceName.MESSAGING.toString(), ServiceStatus.UP.toString());
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}
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} else {
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if (!getServiceStatus(ServiceName.MESSAGING.toString()).equals(ServiceStatus.DOWN.toString())) {
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logger.log(Level.SEVERE, "Failed to connect to ActiveMQ server"); //NON-NLS
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MessageNotifyUtil.Notify.error(NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.failedService.notify.title"), NbBundle.getMessage(ServicesMonitor.class, "ServicesMonitor.failedMessageService.notify.msg"));
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setServiceStatus(ServiceName.MESSAGING.toString(), ServiceStatus.DOWN.toString());
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}
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}
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} catch (UnknownServiceException ex) {
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logger.log(Level.SEVERE, "Exception while checking current service status", ex); //NON-NLS
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}
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}
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}
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