com.spotify.flo.freezer

Class PersistingContext

java.lang.Object

com.spotify.flo.context.ForwardingEvalContext

com.spotify.flo.freezer.PersistingContext

All Implemented Interfaces:

EvalContext

public class PersistingContext
extends ForwardingEvalContext

A EvalContext that serializes and persist tasks. Any call to EvalContext.evaluate(Task) will persist the task and recurse to also do so for all input tasks. No task in the dependency tree will actually be invoked. Instead EvalContext.evaluate(Task) will return a Value that always fails.

After the returned Value has failed, all persisted file paths can be received through getFiles().

Nested Class Summary

Nested classes/interfaces inherited from interface com.spotify.flo.EvalContext

EvalContext.Promise<T>, EvalContext.Value<T>

Field Summary

Fields inherited from class com.spotify.flo.context.ForwardingEvalContext

delegate

Constructor Summary

Constructors

Constructor and Description
PersistingContext(Path basePath, EvalContext delegate)

Method Summary

Modifier and Type	Method and Description
static String	cleanForFilename(TaskId taskId)
static <T> T	deserialize(Path filePath)
<T> EvalContext.Value<T>	evaluateInternal(Task<T> task, EvalContext context)
Map<TaskId,Path>	getFiles()
<T> EvalContext.Value<T>	invokeProcessFn(TaskId taskId, Fn<EvalContext.Value<T>> processFn)
static void	serialize(Object object, Path file)

Methods inherited from class com.spotify.flo.context.ForwardingEvalContext

immediateValue, promise, value

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.spotify.flo.EvalContext

async, currentTask, evaluate, sync

Constructor Detail

PersistingContext

public PersistingContext(Path basePath,
                         EvalContext delegate)

Method Detail

getFiles

public Map<TaskId,Path> getFiles()

evaluateInternal

public <T> EvalContext.Value<T> evaluateInternal(Task<T> task,
                                                 EvalContext context)

Specified by:

evaluateInternal in interface EvalContext

Overrides:

evaluateInternal in class ForwardingEvalContext

invokeProcessFn

public <T> EvalContext.Value<T> invokeProcessFn(TaskId taskId,
                                                Fn<EvalContext.Value<T>> processFn)

Specified by:

invokeProcessFn in interface EvalContext

Overrides:

invokeProcessFn in class ForwardingEvalContext

serialize

public static void serialize(Object object,
                             Path file)
                      throws Exception

Throws:

Exception

deserialize

public static <T> T deserialize(Path filePath)
                         throws Exception

Throws:

Exception

cleanForFilename

public static String cleanForFilename(TaskId taskId)