Package com.yahoo.documentapi.messagebus.protocol

Class ContentPolicy

java.lang.Object

com.yahoo.documentapi.messagebus.protocol.SlobrokPolicy

com.yahoo.documentapi.messagebus.protocol.ContentPolicy

All Implemented Interfaces:

DocumentProtocolRoutingPolicy, com.yahoo.messagebus.routing.RoutingPolicy

public class ContentPolicy
extends SlobrokPolicy

Routing policy to determine which distributor in a content cluster to send data to. Using different key=value parameters separated by semicolon (";"), the user can control which cluster to send to. cluster=[clusterName] (Mandatory, determines the cluster name) config=[config] (Optional, a comma separated list of config servers to use. Used to talk to clusters not defined in this vespa application) clusterconfigid=[id] (Optional, use given config id for distribution instead of default)

Author:

Haakon Humberset

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ContentPolicy.BucketIdCalculator	Helper class to get the bucket identifier of a message.
static final class	ContentPolicy.DistributorSelectionLogic	Class handling the logic of picking a distributor
static class	ContentPolicy.HostFetcher	Helper class to match a host pattern with node to use.
static interface	ContentPolicy.InstabilityChecker	Tracks "instability" across nodes based on number of failures received versus some implementation-specific limit.
static class	ContentPolicy.Parameters	Class parsing the semicolon separated parameter string and exposes the appropriate value to the policy.
static class	ContentPolicy.PerNodeCountingInstabilityChecker	Class that tracks a failure of a given type per node.
static class	ContentPolicy.SlobrokHostFetcher	Host fetcher using a slobrok mirror to find the hosts.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	owningBucketStates

Constructor Summary

Constructors

Constructor	Description
ContentPolicy(ContentPolicy.Parameters p)	Constructor specifying a bit more in detail, so we can override what needs to be overridden in tests
ContentPolicy(String param, com.yahoo.vespa.config.content.DistributionConfig config)	Constructor used in production.

Method Summary

Modifier and Type	Method	Description
void	destroy()
void	merge(com.yahoo.messagebus.routing.RoutingContext context)
void	select(com.yahoo.messagebus.routing.RoutingContext context)

Methods inherited from class com.yahoo.documentapi.messagebus.protocol.SlobrokPolicy

lookup, parse

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

owningBucketStates

public static final String owningBucketStates

See Also:

• Constant Field Values

Constructor Details

ContentPolicy

public ContentPolicy(String param,
 com.yahoo.vespa.config.content.DistributionConfig config)

Constructor used in production.

ContentPolicy

public ContentPolicy(ContentPolicy.Parameters p)

Constructor specifying a bit more in detail, so we can override what needs to be overridden in tests

Method Details

select

public void select(com.yahoo.messagebus.routing.RoutingContext context)

merge

public void merge(com.yahoo.messagebus.routing.RoutingContext context)

destroy

public void destroy()