Package software.amazon.cloudformation.proxy

Class StdCallbackContext

java.lang.Object

software.amazon.cloudformation.proxy.StdCallbackContext

@ThreadSafe
public class StdCallbackContext
extends Object

StdCallbackContext provide a mechanism that automatically provides the memoization for retention and callback of request, responses, stabilize handles during handler invocations. During replay callbacks, this automatically replays responses for different calls along the call graph ensuring that we only execute the portions of the call graph that needs execution and dedupe calls as needed. This is not a sophisticated class that does request inspection based call result, it is primarily a function result memoization that is ensured that it is invoked once. Attempts to call the function multiple times with different arguments will yield the same result for the same call graph key for request(String, Function) and response(String, BiFunction). For stabilize(String, CallChain.Callback), only when True is returned it is memoized.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	StdCallbackContext.Deserializer
static class	StdCallbackContext.Serializer

Constructor Summary

Constructors

Constructor	Description
StdCallbackContext()

Method Summary

Modifier and Type	Method	Description
int	attempts(String callGraph)
void	attempts(String callGraph, int attempts)
Map<String,Object>	callGraphs()
<R> R	evictRequestRecord(String callGraph)
<RequestT> List<RequestT>	findAllRequestByContains(String contains)
<ResponseT> List<ResponseT>	findAllResponseByContains(String contains)
<RequestT> RequestT	findFirstRequestByContains(String contains)
<ResponseT> ResponseT	findFirstResponseByContains(String contains)
<M,R> Function<M,R>	request(String callGraph, Function<M,R> func)
<ResponseT> ResponseT	response(String callGraph)
<R,C,RT> BiFunction<R,C,RT>	response(String callGraph, BiFunction<R,C,RT> func)

Methods inherited from class java.lang.Object

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

Constructor Detail

StdCallbackContext

public StdCallbackContext()

Method Detail

request

public <M,R> Function<M,R> request(String callGraph,
                                               Function<M,R> func)

evictRequestRecord

public <R> R evictRequestRecord(String callGraph)

response

public <R,C,RT> BiFunction<R,C,RT> response(String callGraph,
                                                                    BiFunction<R,C,RT> func)

callGraphs

public Map<String,Object> callGraphs()

response

public <ResponseT> ResponseT response(String callGraph)

findFirstRequestByContains

public <RequestT> RequestT findFirstRequestByContains(String contains)

findAllRequestByContains

public <RequestT> List<RequestT> findAllRequestByContains(String contains)

findFirstResponseByContains

public <ResponseT> ResponseT findFirstResponseByContains(String contains)

findAllResponseByContains

public <ResponseT> List<ResponseT> findAllResponseByContains(String contains)

attempts

public int attempts(String callGraph)

attempts

public void attempts(String callGraph,
                     int attempts)