com.sap.cloud.sdk.s4hana.datamodel.odata.helper

Class ODataRequestCommand<T>

java.lang.Object

com.netflix.hystrix.HystrixCommand<T>

com.sap.cloud.sdk.frameworks.hystrix.Command<T>

com.sap.cloud.sdk.s4hana.connectivity.ErpCommand<T>

com.sap.cloud.sdk.s4hana.datamodel.odata.helper.ODataRequestCommand<T>

Type Parameters:

T - Return type of the OData request.

All Implemented Interfaces:

com.netflix.hystrix.HystrixExecutable<T>, com.netflix.hystrix.HystrixInvokable<T>, com.netflix.hystrix.HystrixInvokableInfo<T>, com.netflix.hystrix.HystrixObservable<T>, WithErpConfigContext

public class ODataRequestCommand<T>
extends ErpCommand<T>

Hystrix-based ErpCommand for executing an OData request without caching the result. The OData request is represented by the fully prepared fluent helper, which is executed on the given ErpConfigContext when this command is being executed.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	com.netflix.hystrix.AbstractCommand.CommandState
protected static class	com.netflix.hystrix.AbstractCommand.ThreadState
protected static class	com.netflix.hystrix.AbstractCommand.TimedOutStatus

Nested classes/interfaces inherited from class com.netflix.hystrix.HystrixCommand

com.netflix.hystrix.HystrixCommand.Setter

Field Summary

Fields

Modifier and Type	Field and Description
protected com.netflix.hystrix.HystrixCircuitBreaker	circuitBreaker
protected static ConcurrentHashMap<com.netflix.hystrix.HystrixCommandKey,Boolean>	commandContainsFallback
protected com.netflix.hystrix.HystrixCommandGroupKey	commandGroup
protected com.netflix.hystrix.HystrixCommandKey	commandKey
protected long	commandStartTimestamp
protected AtomicReference<com.netflix.hystrix.AbstractCommand.CommandState>	commandState
protected com.netflix.hystrix.strategy.concurrency.HystrixConcurrencyStrategy	concurrencyStrategy
protected com.netflix.hystrix.HystrixRequestLog	currentRequestLog
protected rx.functions.Action0	endCurrentThreadExecutingCommand
protected com.netflix.hystrix.strategy.eventnotifier.HystrixEventNotifier	eventNotifier
protected com.netflix.hystrix.strategy.executionhook.HystrixCommandExecutionHook	executionHook
protected com.netflix.hystrix.ExecutionResult	executionResult
protected com.netflix.hystrix.ExecutionResult	executionResultAtTimeOfCancellation
protected com.netflix.hystrix.AbstractCommand.TryableSemaphore	executionSemaphoreOverride
protected static ConcurrentHashMap<String,com.netflix.hystrix.AbstractCommand.TryableSemaphore>	executionSemaphorePerCircuit
protected com.netflix.hystrix.AbstractCommand.TryableSemaphore	fallbackSemaphoreOverride
protected static ConcurrentHashMap<String,com.netflix.hystrix.AbstractCommand.TryableSemaphore>	fallbackSemaphorePerCircuit
protected AtomicReference<com.netflix.hystrix.AbstractCommand.TimedOutStatus>	isCommandTimedOut
protected boolean	isResponseFromCache
protected com.netflix.hystrix.HystrixCommandMetrics	metrics
protected com.netflix.hystrix.HystrixCommandProperties	properties
protected com.netflix.hystrix.HystrixRequestCache	requestCache
protected com.netflix.hystrix.HystrixThreadPool	threadPool
protected com.netflix.hystrix.HystrixThreadPoolKey	threadPoolKey
protected AtomicReference<com.netflix.hystrix.AbstractCommand.ThreadState>	threadState
protected AtomicReference<Reference<com.netflix.hystrix.util.HystrixTimer.TimerListener>>	timeoutTimer

Constructor Summary

Constructors

Constructor and Description
ODataRequestCommand(FluentHelperBasic<?,?,T> oDataRequest) Creates an ODataRequestCommand instance with a default configuration context.
ODataRequestCommand(FluentHelperBasic<?,?,T> oDataRequest, ErpConfigContext configContext) Creates an ODataRequestCommand instance.
ODataRequestCommand(FluentHelperBasic<?,?,T> oDataRequest, com.netflix.hystrix.HystrixCommand.Setter setter) Creates an ODataRequestCommand instance.
ODataRequestCommand(FluentHelperBasic<?,?,T> oDataRequest, com.netflix.hystrix.HystrixCommand.Setter setter, ErpConfigContext configContext) Creates an ODataRequestCommand instance.

Method Summary

Modifier and Type	Method and Description
protected Throwable	decomposeException(Exception arg0)
protected String	getCacheKey()
protected Exception	getExceptionFromThrowable(Throwable arg0)
protected com.netflix.hystrix.AbstractCommand.TryableSemaphore	getExecutionSemaphore()
protected T	getFallback()
protected com.netflix.hystrix.AbstractCommand.TryableSemaphore	getFallbackSemaphore()
protected String	getLogMessagePrefix()
FluentHelperBasic<?,?,T>	getODataRequest() Returns the OData request that will be executed by this command.
protected void	handleThreadEnd(com.netflix.hystrix.AbstractCommand<R> arg0)
protected boolean	isRequestCachingEnabled()
protected T	run()
protected boolean	shouldNotBeWrapped(Throwable arg0)
protected boolean	shouldOutputOnNextEvents()
ODataRequestCommand<T>	withFallback(Function<Throwable,T> fallbackFunction) Registers a fallback for this command.

Methods inherited from class com.sap.cloud.sdk.s4hana.connectivity.ErpCommand

getConfigContext

Methods inherited from class com.netflix.hystrix.HystrixCommand

commandIsScalar, execute, getExecutionObservable, getFallbackMethodName, getFallbackObservable, isFallbackUserDefined, queue

Methods inherited from class java.lang.Object

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

Field Detail

circuitBreaker

protected final com.netflix.hystrix.HystrixCircuitBreaker circuitBreaker

threadPool

protected final com.netflix.hystrix.HystrixThreadPool threadPool

threadPoolKey

protected final com.netflix.hystrix.HystrixThreadPoolKey threadPoolKey

properties

protected final com.netflix.hystrix.HystrixCommandProperties properties

metrics

protected final com.netflix.hystrix.HystrixCommandMetrics metrics

commandKey

protected final com.netflix.hystrix.HystrixCommandKey commandKey

commandGroup

protected final com.netflix.hystrix.HystrixCommandGroupKey commandGroup

eventNotifier

protected final com.netflix.hystrix.strategy.eventnotifier.HystrixEventNotifier eventNotifier

concurrencyStrategy

protected final com.netflix.hystrix.strategy.concurrency.HystrixConcurrencyStrategy concurrencyStrategy

executionHook

protected final com.netflix.hystrix.strategy.executionhook.HystrixCommandExecutionHook executionHook

fallbackSemaphoreOverride

protected final com.netflix.hystrix.AbstractCommand.TryableSemaphore fallbackSemaphoreOverride

fallbackSemaphorePerCircuit

protected static final ConcurrentHashMap<String,com.netflix.hystrix.AbstractCommand.TryableSemaphore> fallbackSemaphorePerCircuit

executionSemaphoreOverride

protected final com.netflix.hystrix.AbstractCommand.TryableSemaphore executionSemaphoreOverride

executionSemaphorePerCircuit

protected static final ConcurrentHashMap<String,com.netflix.hystrix.AbstractCommand.TryableSemaphore> executionSemaphorePerCircuit

timeoutTimer

protected final AtomicReference<Reference<com.netflix.hystrix.util.HystrixTimer.TimerListener>> timeoutTimer

commandState

protected AtomicReference<com.netflix.hystrix.AbstractCommand.CommandState> commandState

threadState

protected AtomicReference<com.netflix.hystrix.AbstractCommand.ThreadState> threadState

executionResult

protected volatile com.netflix.hystrix.ExecutionResult executionResult

isResponseFromCache

protected volatile boolean isResponseFromCache

executionResultAtTimeOfCancellation

protected volatile com.netflix.hystrix.ExecutionResult executionResultAtTimeOfCancellation

commandStartTimestamp

protected volatile long commandStartTimestamp

isCommandTimedOut

protected final AtomicReference<com.netflix.hystrix.AbstractCommand.TimedOutStatus> isCommandTimedOut

endCurrentThreadExecutingCommand

protected volatile rx.functions.Action0 endCurrentThreadExecutingCommand

requestCache

protected final com.netflix.hystrix.HystrixRequestCache requestCache

currentRequestLog

protected final com.netflix.hystrix.HystrixRequestLog currentRequestLog

commandContainsFallback

protected static ConcurrentHashMap<com.netflix.hystrix.HystrixCommandKey,Boolean> commandContainsFallback

Constructor Detail

ODataRequestCommand

public ODataRequestCommand(@Nonnull
                           FluentHelperBasic<?,?,T> oDataRequest)

Creates an ODataRequestCommand instance with a default configuration context.

Parameters:

oDataRequest - The OData request to be executed by this command, as a fully prepared fluent helper.

ODataRequestCommand

public ODataRequestCommand(@Nonnull
                           FluentHelperBasic<?,?,T> oDataRequest,
                           @Nonnull
                           ErpConfigContext configContext)

Creates an ODataRequestCommand instance.

Parameters:

oDataRequest - The OData request to be executed by this command, as a fully prepared fluent helper.

configContext - The configuration context with which the given request will be executed.

ODataRequestCommand

public ODataRequestCommand(@Nonnull
                           FluentHelperBasic<?,?,T> oDataRequest,
                           @Nonnull
                           com.netflix.hystrix.HystrixCommand.Setter setter)

Creates an ODataRequestCommand instance.

Parameters:

oDataRequest - The OData request to be executed by this command, as a fully prepared fluent helper.

setter - The configuration of the command.

ODataRequestCommand

public ODataRequestCommand(@Nonnull
                           FluentHelperBasic<?,?,T> oDataRequest,
                           @Nonnull
                           com.netflix.hystrix.HystrixCommand.Setter setter,
                           @Nonnull
                           ErpConfigContext configContext)

Creates an ODataRequestCommand instance.

Parameters:

oDataRequest - The OData request to be executed by this command, as a fully prepared fluent helper.

setter - The configuration of the command.

configContext - The configuration context with which the given request will be executed.

Method Detail

withFallback

@Nonnull
public ODataRequestCommand<T> withFallback(@Nonnull
                                                    Function<Throwable,T> fallbackFunction)

Registers a fallback for this command.

Parameters:

fallbackFunction - The fallback function to be used.

run

protected T run()
         throws com.sap.cloud.sdk.odatav2.connectivity.ODataException

Specified by:

run in class com.netflix.hystrix.HystrixCommand<T>

Throws:

com.sap.cloud.sdk.odatav2.connectivity.ODataException

getFallback

protected T getFallback()

Overrides:

getFallback in class com.netflix.hystrix.HystrixCommand<T>

getODataRequest

@Nonnull
public FluentHelperBasic<?,?,T> getODataRequest()

Returns the OData request that will be executed by this command.

shouldNotBeWrapped

protected boolean shouldNotBeWrapped(Throwable arg0)

handleThreadEnd

protected void handleThreadEnd(com.netflix.hystrix.AbstractCommand<R> arg0)

shouldOutputOnNextEvents

protected boolean shouldOutputOnNextEvents()

getFallbackSemaphore

protected com.netflix.hystrix.AbstractCommand.TryableSemaphore getFallbackSemaphore()

getExecutionSemaphore

protected com.netflix.hystrix.AbstractCommand.TryableSemaphore getExecutionSemaphore()

decomposeException

protected Throwable decomposeException(Exception arg0)

getCacheKey

protected String getCacheKey()

isRequestCachingEnabled

protected boolean isRequestCachingEnabled()

getLogMessagePrefix

protected String getLogMessagePrefix()

getExceptionFromThrowable

protected Exception getExceptionFromThrowable(Throwable arg0)