com.baidubce

Class AbstractBceClient

java.lang.Object

com.baidubce.AbstractBceClient

Direct Known Subclasses:

BosClient, SesClientSupport

@ThreadSafe
public abstract class AbstractBceClient
extends Object

Abstract base class for BCE service clients.

Responsible for basic client capabilities that are the same across all BCE SDK Java clients (ex: setting the client endpoint).

Subclass names should be in the form of "com.baidubce.services.xxx.XxxClient", while "xxx" is the service ID and "Xxx" is the capitalized service ID.

Field Summary

Fields

Modifier and Type	Field and Description
protected BceClientConfiguration	config The client configuration for this client.
static String	DEFAULT_CONTENT_TYPE The default http request content type for all BCE service APIs.
static String	DEFAULT_ENCODING The default string encoding for all BCE service APIs.
static String	DEFAULT_SERVICE_DOMAIN The default service domain for BCE.
static String	URL_PREFIX The common URL prefix for all BCE service APIs.

Constructor Summary

Constructors

Constructor and Description
AbstractBceClient(BceClientConfiguration config, HttpResponseHandler[] responseHandlers) Constructs a new AbstractBceClient with the specified client configuration and handlers.

Method Summary

Methods

Modifier and Type	Method and Description
URI	getEndpoint() Returns the service endpoint to which this client will send requests.
String	getServiceId() Returns the target service ID.
protected <T extends AbstractBceResponse> T	invokeHttpClient(InternalRequest request, Class<T> responseClass) Subclasses should invoke this method for sending request to the target service.
boolean	isRegionSupported() Returns true if the target service supports regions.
void	shutdown() Shuts down the client and releases all underlying resources.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_SERVICE_DOMAIN

public static final String DEFAULT_SERVICE_DOMAIN

The default service domain for BCE.

See Also:

Constant Field Values

URL_PREFIX

public static final String URL_PREFIX

The common URL prefix for all BCE service APIs.

See Also:

Constant Field Values

DEFAULT_ENCODING

public static final String DEFAULT_ENCODING

The default string encoding for all BCE service APIs.

See Also:

Constant Field Values

DEFAULT_CONTENT_TYPE

public static final String DEFAULT_CONTENT_TYPE

The default http request content type for all BCE service APIs.

See Also:

Constant Field Values

config

protected BceClientConfiguration config

The client configuration for this client.

Constructor Detail

AbstractBceClient

public AbstractBceClient(BceClientConfiguration config,
                 HttpResponseHandler[] responseHandlers)

Constructs a new AbstractBceClient with the specified client configuration and handlers.

The constructor will extract serviceId from the class name automatically. And if there is no endpoint specified in the client configuration, the constructor will create a default one.

Parameters:

config - the client configuration. The constructor makes a copy of this parameter so that it is safe to change the configuration after then.

responseHandlers - a list of handlers for processing HTTP responses from services. See BceHttpClient.execute(InternalRequest, Class, HttpResponseHandler[])

Throws:

IllegalStateException - if the class name does not follow the naming convention for BCE clients.

IllegalArgumentException - if the endpoint specified in the client configuration is not a valid URI.

Method Detail

isRegionSupported

public boolean isRegionSupported()

Returns true if the target service supports regions.

The result will impact the construction of default service endpoint.

Returns:

true if the target service supports regions.

getEndpoint

public URI getEndpoint()

Returns the service endpoint to which this client will send requests.

Returns:

the service endpoint to which this client will send requests.

getServiceId

public String getServiceId()

Returns the target service ID.

Returns:

the target service ID.

shutdown

public void shutdown()

Shuts down the client and releases all underlying resources.

Invoking this method is NOT a must. Once it is called, no subsequent requests should be made.

invokeHttpClient

protected <T extends AbstractBceResponse> T invokeHttpClient(InternalRequest request,
                                                 Class<T> responseClass)

Subclasses should invoke this method for sending request to the target service.

This method will add "Content-Type" and "Date" to headers with default values if not present.

Parameters:

request - the request to build up the HTTP request.

responseClass - the response class.

Returns:

the final response object.