org.apache.flink.runtime.taskmanager

Class TaskManagerLocation

java.lang.Object

org.apache.flink.runtime.taskmanager.TaskManagerLocation

All Implemented Interfaces:

Serializable, Comparable<TaskManagerLocation>

public class TaskManagerLocation
extends Object
implements Comparable<TaskManagerLocation>, Serializable

This class encapsulates the connection information of a TaskManager. It describes the host where the TaskManager operates and its server port for data exchange. This class also contains utilities to work with the TaskManager's host name, which is used to localize work assignments.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TaskManagerLocation.DefaultHostNameSupplier This Supplier class could retrieve the FQDN host name of the given InetAddress on demand, extract the pure host name and cache the results for later use.
static interface	TaskManagerLocation.HostNameSupplier
static class	TaskManagerLocation.IpOnlyHostNameSupplier This Supplier class returns the IP address of the given InetAddress directly, therefore no reverse DNS lookup is required.
static class	TaskManagerLocation.ResolutionMode The DNS resolution mode for TaskManager's IP address.

Constructor Summary

Constructors

Constructor and Description
TaskManagerLocation(ResourceID resourceID, InetAddress inetAddress, int dataPort) Constructs a new instance connection info object.
TaskManagerLocation(ResourceID resourceID, InetAddress inetAddress, int dataPort, TaskManagerLocation.HostNameSupplier hostNameSupplier, String nodeId) Constructs a new instance connection info object.

Method Summary

Modifier and Type	Method and Description
InetAddress	address() Returns the network address the instance's task manager binds its sockets to.
String	addressString() Gets the IP address where the TaskManager operates.
int	compareTo(TaskManagerLocation o)
int	dataPort() Returns the port instance's task manager expects to receive transfer envelopes on.
boolean	equals(Object obj)
static TaskManagerLocation	fromUnresolvedLocation(UnresolvedTaskManagerLocation unresolvedLocation, TaskManagerLocation.ResolutionMode resolutionMode)
String	getFQDNHostname() Returns the fully-qualified domain name of the TaskManager provided by hostNameSupplier.
String	getHostname() Gets the hostname of the TaskManager from hostNameSupplier.
static String	getHostName(InetAddress inetAddress) Gets the hostname of the TaskManager based on the network address.
String	getNodeId() Return the ID of node where the task manager is located on.
ResourceID	getResourceID() Gets the ID of the resource in which the TaskManager is started.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

TaskManagerLocation

@VisibleForTesting
public TaskManagerLocation(ResourceID resourceID,
                                              InetAddress inetAddress,
                                              int dataPort,
                                              TaskManagerLocation.HostNameSupplier hostNameSupplier,
                                              String nodeId)

Constructs a new instance connection info object. The constructor will attempt to retrieve the instance's host name and domain name through the operating system's lookup mechanisms.

Parameters:

inetAddress - the network address the instance's task manager binds its sockets to

dataPort - the port instance's task manager expects to receive transfer envelopes on

hostNameSupplier - the supplier for obtaining fully-qualified domain name and pure hostname of the task manager

nodeId - the ID of node where the task manager is located on.

TaskManagerLocation

@VisibleForTesting
public TaskManagerLocation(ResourceID resourceID,
                                              InetAddress inetAddress,
                                              int dataPort)

Constructs a new instance connection info object. The constructor will attempt to retrieve the instance's host name and domain name through the operating system's lookup mechanisms.

Parameters:

inetAddress - the network address the instance's task manager binds its sockets to

dataPort - the port instance's task manager expects to receive transfer envelopes on

Method Detail

fromUnresolvedLocation

public static TaskManagerLocation fromUnresolvedLocation(UnresolvedTaskManagerLocation unresolvedLocation,
                                                         TaskManagerLocation.ResolutionMode resolutionMode)
                                                  throws UnknownHostException

Throws:

UnknownHostException

getResourceID

public ResourceID getResourceID()

Gets the ID of the resource in which the TaskManager is started. The format of this depends on how the TaskManager is started:

• If the TaskManager is started via YARN, this is the YARN container ID.
• If the TaskManager is started in standalone mode, or via a MiniCluster, this is a random ID.
• Other deployment modes can set the resource ID in other ways.

Returns:

The ID of the resource in which the TaskManager is started

dataPort

public int dataPort()

Returns the port instance's task manager expects to receive transfer envelopes on.

Returns:

the port instance's task manager expects to receive transfer envelopes on

address

public InetAddress address()

Returns the network address the instance's task manager binds its sockets to.

Returns:

the network address the instance's task manager binds its sockets to

addressString

public String addressString()

Gets the IP address where the TaskManager operates.

Returns:

The IP address.

getFQDNHostname

public String getFQDNHostname()

Returns the fully-qualified domain name of the TaskManager provided by hostNameSupplier.

Returns:

The fully-qualified domain name of the TaskManager.

getHostname

public String getHostname()

Gets the hostname of the TaskManager from hostNameSupplier.

Returns:

The hostname of the TaskManager.

getNodeId

public String getNodeId()

Return the ID of node where the task manager is located on.

Returns:

The ID of node where the task manager is located on.

getHostName

public static String getHostName(InetAddress inetAddress)

Gets the hostname of the TaskManager based on the network address.

Parameters:

inetAddress - the network address that the TaskManager binds its sockets to

Returns:

hostname of the TaskManager

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

compareTo

public int compareTo(@Nonnull
                     TaskManagerLocation o)

Specified by:

compareTo in interface Comparable<TaskManagerLocation>