com.amazonaws.http

Class AmazonHttpClient

java.lang.Object

com.amazonaws.http.AmazonHttpClient

@ThreadSafe
public class AmazonHttpClient
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static String	HEADER_SDK_RETRY_INFO
static String	HEADER_SDK_TRANSACTION_ID
static String	HEADER_USER_AGENT

Constructor Summary

Constructors

Constructor and Description
AmazonHttpClient(ClientConfiguration config) Constructs a new AWS client using the specified client configuration options (ex: max retry attempts, proxy httpClientSettings, etc).
AmazonHttpClient(ClientConfiguration clientConfig, ConnectionManagerAwareHttpClient httpClient, RequestMetricCollector requestMetricCollector) Package-protected constructor for unit test purposes.
AmazonHttpClient(ClientConfiguration config, RequestMetricCollector requestMetricCollector) Constructs a new AWS client using the specified client configuration options (ex: max retry attempts, proxy httpClientSettings, etc), and request metric collector.
AmazonHttpClient(ClientConfiguration config, RequestMetricCollector requestMetricCollector, boolean useBrowserCompatibleHostNameVerifier) Constructs a new AWS client using the specified client configuration options (ex: max retry attempts, proxy httpClientSettings, etc), and request metric collector.
AmazonHttpClient(ClientConfiguration config, RequestMetricCollector requestMetricCollector, boolean useBrowserCompatibleHostNameVerifier, boolean calculateCRC32FromCompressedData) Constructs a new AWS client using the specified client configuration options (ex: max retry attempts, proxy httpClientSettings, etc), and request metric collector.

Method Summary

Modifier and Type	Method and Description
<T> Response<T>	execute(Request<?> request, HttpResponseHandler<AmazonWebServiceResponse<T>> responseHandler, HttpResponseHandler<AmazonServiceException> errorResponseHandler, ExecutionContext executionContext) Executes the request and returns the result.
<T> Response<T>	executeWithTimer(Request<?> request, HttpResponseHandler<AmazonWebServiceResponse<T>> responseHandler, HttpResponseHandler<AmazonServiceException> errorResponseHandler, ExecutionContext executionContext) Start and end client execution timer around the execution of the request.
ClientExecutionTimer	getClientExecutionTimer() Package protected for unit-testing
HttpRequestTimer	getHttpRequestTimer() Package protected for unit-testing
RequestMetricCollector	getRequestMetricCollector() Returns the httpClientSettings client specific request metric collector; or null if there is none.
ResponseMetadata	getResponseMetadataForRequest(AmazonWebServiceRequest request) Returns additional response metadata for an executed request.
int	getTimeOffset() Returns the time difference in seconds between this client and AWS.
void	shutdown() Shuts down this HTTP client object, releasing any resources that might be held open.

Methods inherited from class java.lang.Object

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

Field Detail

HEADER_USER_AGENT

public static final String HEADER_USER_AGENT

See Also:

Constant Field Values

HEADER_SDK_TRANSACTION_ID

public static final String HEADER_SDK_TRANSACTION_ID

See Also:

Constant Field Values

HEADER_SDK_RETRY_INFO

public static final String HEADER_SDK_RETRY_INFO

See Also:

Constant Field Values

Constructor Detail

AmazonHttpClient

public AmazonHttpClient(ClientConfiguration config)

Constructs a new AWS client using the specified client configuration options (ex: max retry attempts, proxy httpClientSettings, etc).

Parameters:

config - Configuration options specifying how this client will communicate with AWS (ex: proxy httpClientSettings, retry count, etc.).

AmazonHttpClient

public AmazonHttpClient(ClientConfiguration config,
                        RequestMetricCollector requestMetricCollector)

Constructs a new AWS client using the specified client configuration options (ex: max retry attempts, proxy httpClientSettings, etc), and request metric collector.

Parameters:

config - Configuration options specifying how this client will communicate with AWS (ex: proxy httpClientSettings, retry count, etc.).

requestMetricCollector - client specific request metric collector, which takes precedence over the one at the AWS SDK level; or null if there is none.

AmazonHttpClient

public AmazonHttpClient(ClientConfiguration config,
                        RequestMetricCollector requestMetricCollector,
                        boolean useBrowserCompatibleHostNameVerifier)

Constructs a new AWS client using the specified client configuration options (ex: max retry attempts, proxy httpClientSettings, etc), and request metric collector.

Parameters:

config - Configuration options specifying how this client will communicate with AWS (ex: proxy httpClientSettings, retry count, etc.).

requestMetricCollector - client specific request metric collector, which takes precedence over the one at the AWS SDK level; or null if there is none.

AmazonHttpClient

public AmazonHttpClient(ClientConfiguration config,
                        RequestMetricCollector requestMetricCollector,
                        boolean useBrowserCompatibleHostNameVerifier,
                        boolean calculateCRC32FromCompressedData)

Constructs a new AWS client using the specified client configuration options (ex: max retry attempts, proxy httpClientSettings, etc), and request metric collector.

Parameters:

config - Configuration options specifying how this client will communicate with AWS (ex: proxy httpClientSettings, retry count, etc.).

requestMetricCollector - client specific request metric collector, which takes precedence over the one at the AWS SDK level; or null if there is none.

calculateCRC32FromCompressedData - The flag indicating whether the CRC32 checksum is calculated from compressed data or not. It is only applicable when the header "x-amz-crc32" is set in the response.

AmazonHttpClient

public AmazonHttpClient(ClientConfiguration clientConfig,
                        ConnectionManagerAwareHttpClient httpClient,
                        RequestMetricCollector requestMetricCollector)

Package-protected constructor for unit test purposes.

Method Detail

getHttpRequestTimer

public HttpRequestTimer getHttpRequestTimer()

Package protected for unit-testing

getClientExecutionTimer

public ClientExecutionTimer getClientExecutionTimer()

Package protected for unit-testing

getResponseMetadataForRequest

public ResponseMetadata getResponseMetadataForRequest(AmazonWebServiceRequest request)

Returns additional response metadata for an executed request. Response metadata isn't considered part of the standard results returned by an operation, so it's accessed instead through this diagnostic interface. Response metadata is typically used for troubleshooting issues with AWS support staff when services aren't acting as expected.

Parameters:

request - A previously executed AmazonWebServiceRequest object, whose response metadata is desired.

Returns:

The response metadata for the specified request, otherwise null if there is no response metadata available for the request.

execute

public <T> Response<T> execute(Request<?> request,
                               HttpResponseHandler<AmazonWebServiceResponse<T>> responseHandler,
                               HttpResponseHandler<AmazonServiceException> errorResponseHandler,
                               ExecutionContext executionContext)

Executes the request and returns the result.

Parameters:

request - The AmazonWebServices request to send to the remote server

responseHandler - A response handler to accept a successful response from the remote server

errorResponseHandler - A response handler to accept an unsuccessful response from the remote server

executionContext - Additional information about the context of this web service call

executeWithTimer

public <T> Response<T> executeWithTimer(Request<?> request,
                                        HttpResponseHandler<AmazonWebServiceResponse<T>> responseHandler,
                                        HttpResponseHandler<AmazonServiceException> errorResponseHandler,
                                        ExecutionContext executionContext)
                                 throws InterruptedException

Start and end client execution timer around the execution of the request. It's important that the client execution task is canceled before the InterruptedExecption is handled by execute(Request, HttpResponseHandler, HttpResponseHandler, ExecutionContext) so the interrupt status doesn't leak out to the callers code

Throws:

InterruptedException

shutdown

public void shutdown()

Shuts down this HTTP client object, releasing any resources that might be held open. This is an optional method, and callers are not expected to call it, but can if they want to explicitly release any open resources. Once a client has been shutdown, it cannot be used to make more requests.

getRequestMetricCollector

public RequestMetricCollector getRequestMetricCollector()

Returns the httpClientSettings client specific request metric collector; or null if there is none.

getTimeOffset

public int getTimeOffset()

Returns the time difference in seconds between this client and AWS.