-
Notifications
You must be signed in to change notification settings - Fork 345
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
107 changed files
with
4,946 additions
and
1,148 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| package org.kairosdb.core; | ||
|
|
||
| import com.google.common.annotations.VisibleForTesting; | ||
| import com.google.common.collect.ImmutableMap; | ||
| import com.google.inject.Inject; | ||
| import com.google.inject.name.Named; | ||
| import org.kairosdb.core.datastore.ServiceKeyStore; | ||
| import org.kairosdb.core.datastore.ServiceKeyValue; | ||
| import org.kairosdb.core.exception.DatastoreException; | ||
| import org.kairosdb.core.exception.KairosDBException; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.concurrent.ScheduledExecutorService; | ||
|
|
||
| import static com.google.common.base.Preconditions.checkNotNull; | ||
| import static org.kairosdb.util.Preconditions.checkNotNullOrEmpty; | ||
|
|
||
| public class HostManager implements KairosDBService | ||
| { | ||
| private static final Logger logger = LoggerFactory.getLogger(HostManager.class); | ||
|
|
||
| private static final String SERVICE = "_Hosts"; | ||
| private static final String SERVICE_KEY = "Active"; | ||
| private static final String DELAY = "kairosdb.host_service_manager.check_delay_time_millseconds"; | ||
| private static final String INACTIVE_TIME = "kairosdb.host_service_manager.inactive_time_seconds"; | ||
| public static final String HOST_MANAGER_SERVICE_EXECUTOR = "HostManagerServiceExecutor"; | ||
|
|
||
| private final ServiceKeyStore keyStore; | ||
| private final String hostname; | ||
| private final long inactiveTimeSeconds; | ||
| private final String guid; | ||
| private ScheduledExecutorService executorService; | ||
|
|
||
| private volatile Map<String, ServiceKeyValue> activeHosts = new HashMap<>(); | ||
|
|
||
| @Inject | ||
| public HostManager(ServiceKeyStore keyStore, | ||
| @Named(HOST_MANAGER_SERVICE_EXECUTOR) ScheduledExecutorService executorService, | ||
| @Named(DELAY) long delay, @Named("HOSTNAME") String hostName, @Named(INACTIVE_TIME) long inactiveTime, | ||
| @Named(Main.KAIROSDB_SERVER_GUID) String guid) | ||
| { | ||
| this.keyStore = checkNotNull(keyStore, "keyStore cannot be null"); | ||
| this.executorService = checkNotNull(executorService, "executorService cannot be null"); | ||
| this.hostname = checkNotNullOrEmpty(hostName, "hostname cannot be null or empty"); | ||
| this.inactiveTimeSeconds = inactiveTime; | ||
| this.guid = checkNotNullOrEmpty(guid, "guid cannot be null or empty"); | ||
|
|
||
| executorService.scheduleWithFixedDelay(new CheckChanges(), 0, delay, java.util.concurrent.TimeUnit.MILLISECONDS); | ||
| } | ||
|
|
||
| private class CheckChanges implements Runnable | ||
| { | ||
| @Override | ||
| public void run() | ||
| { | ||
| checkHostChanges(); | ||
| } | ||
| } | ||
|
|
||
| @VisibleForTesting | ||
| void checkHostChanges() | ||
| { | ||
| try { | ||
| // Add this host to the table if it doesn't exist or update its timestamp | ||
| keyStore.setValue(SERVICE, SERVICE_KEY, guid, hostname); | ||
|
|
||
| Map<String, ServiceKeyValue> hosts = getHostsFromKeyStore(); | ||
|
|
||
| // Remove inactive nodes from the table | ||
| long now = System.currentTimeMillis(); | ||
| for (String guid : hosts.keySet()) { | ||
| ServiceKeyValue host = hosts.get(guid); | ||
| if ((host.getLastModified().getTime() + (1000 * inactiveTimeSeconds)) < now) { | ||
| keyStore.deleteKey(SERVICE, SERVICE_KEY, guid); | ||
| } | ||
| } | ||
|
|
||
| // update cache | ||
| activeHosts = getHostsFromKeyStore(); | ||
| } | ||
| catch (Throwable e) { | ||
| logger.error("Could not access keystore " + SERVICE + ":" + SERVICE_KEY); | ||
| } | ||
| } | ||
|
|
||
| private Map<String, ServiceKeyValue> getHostsFromKeyStore() | ||
| throws DatastoreException | ||
| { | ||
| Map<String, ServiceKeyValue> hosts = new HashMap<>(); | ||
| Iterable<String> guids = keyStore.listKeys(SERVICE, SERVICE_KEY); | ||
| for (String guid : guids) { | ||
| ServiceKeyValue value = keyStore.getValue(SERVICE, SERVICE_KEY, guid); | ||
| if (value != null) { | ||
| hosts.put(guid, value); | ||
| } | ||
| } | ||
| return hosts; | ||
| } | ||
|
|
||
| /** | ||
| * Returns a map of kairos hosts. The key is a guid nd the value is the hostname. There should always be at least one in the map (the current kairos node). | ||
| * @return list of kairos hosts. | ||
| */ | ||
| public Map<String, ServiceKeyValue> getActiveKairosHosts() | ||
| { | ||
| return ImmutableMap.copyOf(activeHosts); | ||
| } | ||
|
|
||
| @Override | ||
| public void start() | ||
| throws KairosDBException | ||
| { | ||
| } | ||
|
|
||
| @Override | ||
| public void stop() | ||
| { | ||
| executorService.shutdown(); | ||
| } | ||
| } |
Oops, something went wrong.