com.tangosol.net.partition.SimpleStrategyMBean Maven / Gradle / Ivy
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/*
* Copyright (c) 2000, 2023, Oracle and/or its affiliates.
*
* Licensed under the Universal Permissive License v 1.0 as shown at
* https://oss.oracle.com/licenses/upl.
*/
package com.tangosol.net.partition;
import com.tangosol.net.PartitionedService;
import com.tangosol.net.management.annotation.Description;
import com.tangosol.net.management.annotation.MetricsScope;
import com.tangosol.net.management.annotation.MetricsTag;
import com.tangosol.net.management.annotation.MetricsValue;
import com.tangosol.net.management.annotation.Notification;
import com.tangosol.net.metrics.MBeanMetric;
import java.util.Date;
/**
* Standard MBean interface that exposes management attributes and operations for
* a {@link SimpleAssignmentStrategy} used by a {@link PartitionedService}.
*
* Each {@link PartitionedService} registers a single instance of this MBean
* bound to a JMX name of the form:
* "Coherence:type=PartitionAssignment,service={ServiceName},responsibility=DistributionCoordinator"
*
* The MBean is attached to a single instance of {@link PartitionAssignmentStrategy} object,
* which exists on the member that is the distribution coordinator for the service.
* The associated MBean will not be explicitly unregistered, but its name will be
* rebound to a new MBean instance if and when a different service member
* becomes the distribution coordinator.
*
* @author op 2012.08.23
* @since Coherence 12.1.2
*/
@MetricsScope(MBeanMetric.Scope.VENDOR)
@Description("Describes the SimpleAssignmentStrategy and the current state of " +
"partition distribution for the corresponding PartitionedService.")
@Notification(description = "DistributionCoordinator notifications.",
types = SimpleStrategyMBean.NOTIFY_LOST)
public interface SimpleStrategyMBean
{
// ----- attributes -----------------------------------------------------
/**
* Get name of the PartitionAssignmentStrategy in use.
*
* @return partitioning strategy name
*/
@Description("The name of the partition assignment strategy in use.")
public String getStrategyName();
/**
* Get the last time a partition distribution analysis was performed.
*
* @return the time of the last analysis
*/
@Description("The last time a distribution analysis was performed.")
public Date getLastAnalysisTime();
/**
* Get the node id of the ownership distribution coordinator.
*
* @return current distribution coordinator node id
*/
@Description("The member id of the service node that is the ownership " +
"distribution coordinator.")
@MetricsTag("coordinatorId")
public int getCoordinatorId();
/**
* Get the configured number of partitions for the service.
*
* @return the partition count
*/
@Description("The configured number of partitions for the service.")
public int getPartitionCount();
/**
* Get the configured number of backups.
*
* @return the backup count
*/
@Description("The configured number of partition backups to be maintained by the service.")
public int getBackupCount();
/**
* Get the number of storage-enabled nodes running this service.
*
* @return the number of storage-enabled nodes
*/
@Description("The number of storage-enabled nodes running this service.")
@MetricsValue
public int getServiceNodeCount();
/**
* Get the number of machines that host storage-enabled nodes running this service.
*
* @return the number of machines with storage-enabled nodes
*/
@Description("The number of machines that host storage-enabled nodes running this service.")
@MetricsValue
public int getServiceMachineCount();
/**
* Get the number of racks that host storage-enabled nodes running this service.
*
* @return the number of racks with storage-enabled nodes
*/
@Description("The number of racks that host storage-enabled nodes running this service.")
@MetricsValue
public int getServiceRackCount();
/**
* Get the number of sites that host storage-enabled nodes running this service.
*
* @return the number of sites with storage-enabled nodes
*/
@Description("The number of sites that host storage-enabled nodes running this service.")
@MetricsValue
public int getServiceSiteCount();
/**
* The High Availability status for the service.
*
* @return one of the following values: ENDANGERED, NODE-SAFE, MACHINE-SAFE, RACK-SAFE, SITE-SAFE
*/
@Description("The High Availability status for this service. The values of MACHINE-SAFE, " +
"RACK-SAFE and SITE-SAFE mean that all the cluster nodes running on any " +
"given machine, rack, or site respectively could be stopped at once without " +
"any data loss. The value of NODE-SAFE means that any cluster node could " +
"be stopped without data loss. The value of ENDANGERED indicates that " +
"abnormal termination of any cluster node that runs this service " +
"could cause data loss.")
public String getHAStatus();
/**
* The High Availability status for the service as an integer.
*
* Below is an example of how to map a HA Status integer to a string:
*
* HAStatus.values()[getHAStatusCode()].name()
*
* @return integer representation of {@link HAStatus}
*
* @since 12.2.1.4.0
*/
@Description("The High Availability status for this service. The value of 3 (MACHINE_SAFE), " +
"of 4 (RACK_SAFE) and 5 (SITE_SAFE) mean that all the cluster nodes running on any " +
"given machine, rack, or site respectively could be stopped at once without " +
"any data loss. The value of 2 (NODE_SAFE) means that any cluster node could " +
"be stopped without data loss. The value of 1 (ENDANGERED) indicates that " +
"abnormal termination of any cluster node that runs this service " +
"could cause data loss.")
@MetricsValue
public int getHAStatusCode();
/**
* The High Availability status that this strategy attempts to achieve.
* Values are the same as for HAStatus attribute.
*
* @return the target High Availability status
*/
@Description("The High Availability status that this strategy attempts to achieve. " +
"Values are the same as for the HAStatus attribute.")
public String getHATarget();
/**
* Get the number of backup partitions per storage-enabled service member
* that this strategy will currently attempt to maintain.
*
* @return the number of backup partitions per storage-enabled member
*/
@Description("The number of backup partitions per storage-enabled service member " +
"that this strategy will currently attempt to maintain.")
public int getFairShareBackup();
/**
* Get the number of primary partitions per storage-enabled service member
* that this strategy will currently attempt to maintain.
*
* @return the number of primary partitions per storage-enabled member
*/
@Description("The number of primary partitions per storage-enabled service member " +
"that this strategy will currently attempt to maintain.")
public int getFairSharePrimary();
/**
* Get the number of distributions (partition transfers) that remain to be
* completed before the service achieves the goals set by this strategy.
*
* @return the number of remaining partition transfers
*/
@Description("The number of partition transfers that remain to be completed " +
"before the service achieves the goals set by this strategy.")
public int getRemainingDistributionCount();
/**
* Get the average partition storage size.
*
* @return the average partition storage size in kilobytes
*/
@Description("The average partition storage size in kilobytes.")
public long getAveragePartitionSizeKB();
/**
* Get the maximum partition storage size.
*
* @return the maximum partition storage size in kilobytes
*/
@Description("The maximum partition storage size in kilobytes.")
public long getMaxPartitionSizeKB();
/**
* Get the average node storage size.
*
* @return the average node storage size in kilobytes
*/
@Description("The average node storage size in kilobytes.")
public long getAverageStorageSizeKB();
/**
* Get maximum node storage size.
*
* @return the maximum node storage size in kilobytes
*/
@Description("The maximum node storage size in kilobytes.")
public long getMaxStorageSizeKB();
/**
* Get the node id with the maximum storage size.
*
* @return the node id with the maximum storage size
*/
@Description("The node ID with the maximum node storage size.")
public int getMaxLoadNodeId();
// ----- operations -----------------------------------------------------
/**
* Report partitions that storage-enabled members are waiting to receive or
* still need to send in order to achieve distribution goal set by the strategy.
*
* @param fVerbose if true, the report includes partition numbers for each scheduled transfer
*
* @return a description of scheduled distributions for the service
*/
@Description("Report partitions that remain to be transferred to achieve the " +
"goals set by this strategy. If fVerbose parameter is set to true, " +
"the report includes details for each scheduled transfer.")
public String reportScheduledDistributions(@Description("fVerbose") boolean fVerbose);
// ----- inner class: HAStatus ------------------------------------------
/**
* HAStatus represents the possible values to represent the High Availability Status of the
* associated PartitionedService. This status represents the strength (and therefore safety)
* of the weakest partition for the associated PartitionedService.
*
* @since 12.2.1.4.0
*/
public enum HAStatus
{
/**
* A partition is orphaned when there are no storage-enabled member of the
* service that holds a primary copy of that partition. A PartitionedService
* that has one or more orphaned partitions is in an orphaned HA state.
*/
ORPHANED,
/**
* Loss of a cluster node that runs a PartitionedService may cause data loss.
*/
ENDANGERED,
/**
* Any cluster member could be stopped without data loss.
*/
NODE_SAFE,
/**
* The cluster nodes running on a machine can be stopped simultaneously without any data loss.
*/
MACHINE_SAFE,
/**
* The cluster nodes running on a rack can be stopped simultaneously without any data loss.
*/
RACK_SAFE,
/**
* The cluster nodes running at a site can be stopped simultaneously without any data loss.
*/
SITE_SAFE;
// ----- public methods ---------------------------------------------
/**
* Return the integer representation of the HAStatus.
*
* @return an integer representation of the HAStatus
*/
public int getCode()
{
// optimization to use ordinal of enumerator for integer constant.
return ordinal();
}
}
// ----- constants ------------------------------------------------------
/**
* Notification type for a "partitions are lost and needs to be recovered"
* event.
*/
public static final String NOTIFY_LOST = "partition.lost";
}