Package org.apache.pulsar.broker.loadbalance.impl

Class SimpleLoadManagerImpl

  • All Implemented Interfaces:
    java.util.function.Consumer<org.apache.pulsar.metadata.api.Notification>, LoadManager
    public class SimpleLoadManagerImpl
extends java.lang.Object
implements LoadManager, java.util.function.Consumer<org.apache.pulsar.metadata.api.Notification>

    • Field Detail

      • RESOURCE_QUOTA_GO_UP_TIMEWINDOW

        public static final long RESOURCE_QUOTA_GO_UP_TIMEWINDOW

      • RESOURCE_QUOTA_GO_DOWN_TIMEWINDOW

        public static final long RESOURCE_QUOTA_GO_DOWN_TIMEWINDOW

      • LOADBALANCER_DYNAMIC_SETTING_STRATEGY_ZPATH

        public static final java.lang.String LOADBALANCER_DYNAMIC_SETTING_STRATEGY_ZPATH
        See Also:
        Constant Field Values

      • SETTING_NAME_STRATEGY

        public static final java.lang.String SETTING_NAME_STRATEGY
        See Also:
        Constant Field Values

      • LOADBALANCER_STRATEGY_LLS

        public static final java.lang.String LOADBALANCER_STRATEGY_LLS
        See Also:
        Constant Field Values

      • LOADBALANCER_STRATEGY_RAND

        public static final java.lang.String LOADBALANCER_STRATEGY_RAND
        See Also:
        Constant Field Values

      • LOADBALANCER_STRATEGY_LEAST_MSG

        public static final java.lang.String LOADBALANCER_STRATEGY_LEAST_MSG
        See Also:
        Constant Field Values

    • Constructor Detail

      • SimpleLoadManagerImpl

        public SimpleLoadManagerImpl()

      • SimpleLoadManagerImpl

        public SimpleLoadManagerImpl​(PulsarService pulsar)

    • Method Detail

      • initialize

        public void initialize​(PulsarService pulsar)
        Description copied from interface: LoadManager
        Initialize this LoadManager.
        Specified by:
        initialize in interface LoadManager
        Parameters:
        pulsar - The service to initialize this with.

      • start

        public void start()
           throws org.apache.pulsar.broker.PulsarServerException
        Specified by:
        start in interface LoadManager
        Throws:
        org.apache.pulsar.broker.PulsarServerException

      • disableBroker

        public void disableBroker()
                   throws java.lang.Exception
        Description copied from interface: LoadManager
        Removes visibility of current broker from loadbalancer list so, other brokers can't redirect any request to this broker and this broker won't accept new connection requests.
        Specified by:
        disableBroker in interface LoadManager
        Throws:
        java.lang.Exception

      • getAvailableBrokers

        public java.util.Set<java.lang.String> getAvailableBrokers()
                                                    throws java.lang.Exception
        Description copied from interface: LoadManager
        Get list of available brokers in cluster.
        Specified by:
        getAvailableBrokers in interface LoadManager
        Returns:
        Throws:
        java.lang.Exception

      • isCentralized

        public boolean isCentralized()
        Description copied from interface: LoadManager
        Is centralized decision making to assign a new bundle.
        Specified by:
        isCentralized in interface LoadManager

      • writeResourceQuotasToZooKeeper

        public void writeResourceQuotasToZooKeeper()
                                    throws java.lang.Exception
        Description copied from interface: LoadManager
        Update namespace bundle resource quota on ZK.
        Specified by:
        writeResourceQuotasToZooKeeper in interface LoadManager
        Throws:
        java.lang.Exception

      • getLoadBalancingMetrics

        public java.util.List<org.apache.pulsar.common.stats.Metrics> getLoadBalancingMetrics()
        Description copied from interface: LoadManager
        Generate load balancing stats metrics.
        Specified by:
        getLoadBalancingMetrics in interface LoadManager

      • getLeastLoaded

        public java.util.Optional<ResourceUnit> getLeastLoaded​(org.apache.pulsar.common.naming.ServiceUnitId serviceUnit)
                                                throws java.lang.Exception
        Description copied from interface: LoadManager
        Returns the Least Loaded Resource Unit decided by some algorithm or criteria which is implementation specific.
        Specified by:
        getLeastLoaded in interface LoadManager
        Throws:
        java.lang.Exception

      • getResourceAvailabilityFor

        public com.google.common.collect.Multimap<java.lang.Long,​ResourceUnit> getResourceAvailabilityFor​(org.apache.pulsar.common.naming.ServiceUnitId serviceUnitId)
                                                                                                 throws java.lang.Exception
        Throws:
        java.lang.Exception

      • accept

        public void accept​(org.apache.pulsar.metadata.api.Notification n)
        Specified by:
        accept in interface java.util.function.Consumer<org.apache.pulsar.metadata.api.Notification>

      • getUpdateRankingHandle

        public java.util.concurrent.Future<?> getUpdateRankingHandle()

      • isAboveLoadLevel

        public static boolean isAboveLoadLevel​(org.apache.pulsar.policies.data.loadbalancer.SystemResourceUsage usage,
                                       float thresholdPercentage)

      • isBelowLoadLevel

        public static boolean isBelowLoadLevel​(org.apache.pulsar.policies.data.loadbalancer.SystemResourceUsage usage,
                                       float thresholdPercentage)

      • getSystemResourceUsage

        public org.apache.pulsar.policies.data.loadbalancer.SystemResourceUsage getSystemResourceUsage()
                                                                                        throws java.io.IOException
        Throws:
        java.io.IOException

      • generateLoadReport

        public org.apache.pulsar.policies.data.loadbalancer.LoadReport generateLoadReport()
                                                                           throws java.lang.Exception
        Description copied from interface: LoadManager
        Generate the load report.
        Specified by:
        generateLoadReport in interface LoadManager
        Throws:
        java.lang.Exception

      • writeLoadReportOnZookeeper

        public void writeLoadReportOnZookeeper()
                                throws java.lang.Exception
        Description copied from interface: LoadManager
        Publish the current load report on ZK.
        Specified by:
        writeLoadReportOnZookeeper in interface LoadManager
        Throws:
        java.lang.Exception

      • doLoadShedding

        public void doLoadShedding()
        Description copied from interface: LoadManager
        Unload a candidate service unit to balance the load.
        Specified by:
        doLoadShedding in interface LoadManager

      • doNamespaceBundleSplit

        public void doNamespaceBundleSplit()
                            throws java.lang.Exception
        Detect and split hot namespace bundles.
        Specified by:
        doNamespaceBundleSplit in interface LoadManager
        Throws:
        java.lang.Exception

      • stop

        public void stop()
          throws org.apache.pulsar.broker.PulsarServerException
        Specified by:
        stop in interface LoadManager
        Throws:
        org.apache.pulsar.broker.PulsarServerException