org.apache.slider.server.appmaster.state

Class NodeMap

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<String,NodeInstance>

org.apache.slider.server.appmaster.state.NodeMap

All Implemented Interfaces:

Serializable, Cloneable, Map<String,NodeInstance>

public class NodeMap
extends HashMap<String,NodeInstance>

Node map map -and methods to work with it. Not Synchronized: caller is expected to lock access.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

Field Summary

Fields

Modifier and Type	Field and Description
protected static org.slf4j.Logger	log

Constructor Summary

Constructors

Constructor and Description
NodeMap(int roleSize) Construct

Method Summary

Methods

Modifier and Type	Method and Description
boolean	buildOrUpdate(List<org.apache.hadoop.yarn.api.records.NodeReport> reports) Test helper: build or update a cluster from a list of node reports
Object	clone() Clone point
List<NodeInstance>	findAllNodesForRole(int role, String label) Scan the current node map for all nodes capable of hosting an instance
NodeInstance	getOrCreate(String hostname) Get the node instance for the specific node -creating it if needed
void	insert(Collection<NodeInstance> nodes) Insert a list of nodes into the map; overwrite any with that name This is a bulk operation for testing.
List<NodeInstance>	listActiveNodes(int role) List the active nodes
void	resetFailedRecently() reset the failed recently counters
String	toString()
boolean	updateNode(String hostname, org.apache.hadoop.yarn.api.records.NodeReport report) Update the node state.

Methods inherited from class java.util.HashMap

clear, containsKey, containsValue, entrySet, get, isEmpty, keySet, put, putAll, remove, size, values

Methods inherited from class java.util.AbstractMap

equals, hashCode

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

equals, hashCode

Field Detail

log

protected static final org.slf4j.Logger log

Constructor Detail

NodeMap

public NodeMap(int roleSize)

Construct

Parameters:

roleSize - number of roles

Method Detail

getOrCreate

public NodeInstance getOrCreate(String hostname)

Get the node instance for the specific node -creating it if needed

Parameters:

hostname - node

Returns:

the instance

listActiveNodes

public List<NodeInstance> listActiveNodes(int role)

List the active nodes

Parameters:

role - role

Returns:

a possibly empty sorted list of all nodes that are active in that role

resetFailedRecently

public void resetFailedRecently()

reset the failed recently counters

updateNode

public boolean updateNode(String hostname,
                 org.apache.hadoop.yarn.api.records.NodeReport report)

Update the node state. Return true if the node state changed: either by being created, or by changing its internal state as defined by NodeInstance.updateNode(NodeReport).

Parameters:

hostname - host name

report - latest node report

Returns:

true if the node state changed enough for a request evaluation.

clone

public Object clone()

Clone point

Overrides:

clone in class HashMap<String,NodeInstance>

Returns:

a shallow clone

insert

public void insert(Collection<NodeInstance> nodes)

Insert a list of nodes into the map; overwrite any with that name This is a bulk operation for testing.

Parameters:

nodes - collection of nodes.

buildOrUpdate

public boolean buildOrUpdate(List<org.apache.hadoop.yarn.api.records.NodeReport> reports)

Test helper: build or update a cluster from a list of node reports

Parameters:

reports - the list of reports

Returns:

true if this has been considered to have changed the cluster

findAllNodesForRole

public List<NodeInstance> findAllNodesForRole(int role,
                                     String label)

Scan the current node map for all nodes capable of hosting an instance

Parameters:

role - role ID

label - label which must match, or "" for no label checks

Returns:

a possibly empty list of node instances matching the criteria.

toString

public String toString()

Overrides:

toString in class AbstractMap<String,NodeInstance>