Package org.apache.hadoop.registry.client.types

Class Endpoint

java.lang.Object

org.apache.hadoop.registry.client.types.Endpoint

All Implemented Interfaces:

Cloneable

@Public
@Evolving
public final class Endpoint
extends Object
implements Cloneable

Description of a single service/component endpoint. It is designed to be marshalled as JSON.

Every endpoint can have more than one address entry, such as a list of URLs to a replicated service, or a (hostname, port) pair. Each of these address entries is represented as a string list, as that is the only reliably marshallable form of a tuple JSON can represent.

Field Summary

Fields

Modifier and Type	Field	Description
List<Map<String,String>>	addresses	a list of address tuples —tuples whose format depends on the address type
String	addressType	Type of address.
String	api	API implemented at the end of the binding
String	protocolType	Protocol type.

Constructor Summary

Constructors

Constructor	Description
Endpoint()	Create an empty instance.
Endpoint(String api, String addressType, String protocolType)	Build an endpoint with an empty address list
Endpoint(String api, String addressType, String protocolType, List<Map<String,String>> addrs)	Build an endpoint with a list of addresses
Endpoint(String api, String addressType, String protocolType, Map<String,String> addr)	Build an endpoint with a single address entry.
Endpoint(String api, String addressType, String protocolType, Map<String,String>... addrs)	Build an endpoint with a list of addresses
Endpoint(String api, String protocolType, URI... uris)	Build an endpoint from a list of URIs; each URI is ASCII-encoded and added to the list of addresses.
Endpoint(Endpoint that)	Create an endpoint from another endpoint.

Method Summary

Modifier and Type	Method	Description
Object	clone()	Shallow clone: the lists of addresses are shared
String	toString()
void	validate()	Validate the record by checking for null fields and other invalid conditions

Methods inherited from class java.lang.Object

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

Field Details

api

public String api

API implemented at the end of the binding

addressType

public String addressType

Type of address. The standard types are defined in AddressTypes

protocolType

public String protocolType

Protocol type. Some standard types are defined in ProtocolTypes

addresses

public List<Map<String,String>> addresses

a list of address tuples —tuples whose format depends on the address type

Constructor Details

Endpoint

public Endpoint()

Create an empty instance.

Endpoint

public Endpoint(Endpoint that)

Create an endpoint from another endpoint. This is a deep clone with a new list of addresses.

Parameters:

that - the endpoint to copy from

Endpoint

public Endpoint(String api,
 String addressType,
 String protocolType,
 List<Map<String,String>> addrs)

Build an endpoint with a list of addresses

Parameters:

api - API name

addressType - address type

protocolType - protocol type

addrs - addresses

Endpoint

public Endpoint(String api,
 String addressType,
 String protocolType)

Build an endpoint with an empty address list

Parameters:

api - API name

addressType - address type

protocolType - protocol type

Endpoint

public Endpoint(String api,
 String addressType,
 String protocolType,
 Map<String,String> addr)

Build an endpoint with a single address entry.

This constructor is superfluous given the varags constructor is equivalent for a single element argument. However, type-erasure in java generics causes javac to warn about unchecked generic array creation. This constructor, which represents the common "one address" case, does not generate compile-time warnings.

Parameters:

api - API name

addressType - address type

protocolType - protocol type

addr - address. May be null —in which case it is not added

Endpoint

public Endpoint(String api,
 String addressType,
 String protocolType,
 Map<String,String>... addrs)

Build an endpoint with a list of addresses

Parameters:

api - API name

addressType - address type

protocolType - protocol type

addrs - addresses. Null elements will be skipped

Endpoint

public Endpoint(String api,
 String protocolType,
 URI... uris)

Build an endpoint from a list of URIs; each URI is ASCII-encoded and added to the list of addresses.

Parameters:

api - API name

protocolType - protocol type

uris - URIs to convert to a list of tup;les

Method Details

toString

public String toString()

Overrides:

toString in class Object

validate

public void validate()

Validate the record by checking for null fields and other invalid conditions

Throws:

NullPointerException - if a field is null when it MUST be set.

RuntimeException - on invalid entries

clone

public Object clone()
             throws CloneNotSupportedException

Shallow clone: the lists of addresses are shared

Overrides:

clone in class Object

Returns:

a cloned instance

Throws:

CloneNotSupportedException