io.rouz.flo.freezer

Class PersistingContext

java.lang.Object

io.rouz.flo.context.ForwardingTaskContext

io.rouz.flo.freezer.PersistingContext

All Implemented Interfaces:

TaskContext

public class PersistingContext
extends ForwardingTaskContext

A TaskContext that serializes and persist tasks. Any call to TaskContext.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 TaskContext.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 io.rouz.flo.TaskContext

TaskContext.Promise<T>, TaskContext.Value<T>

Field Summary

Fields

Modifier and Type	Field and Description
private Path	basePath
private Map<TaskId,Path>	files
private static org.slf4j.Logger	LOG

Fields inherited from class io.rouz.flo.context.ForwardingTaskContext

delegate

Constructor Summary

Constructors

Constructor and Description
PersistingContext(Path basePath, TaskContext delegate)

Method Summary

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

Methods inherited from class io.rouz.flo.context.ForwardingTaskContext

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 io.rouz.flo.TaskContext

async, currentTask, evaluate, inmem

Field Detail

LOG

private static final org.slf4j.Logger LOG

basePath

private final Path basePath

files

private final Map<TaskId,Path> files

Constructor Detail

PersistingContext

public PersistingContext(Path basePath,
                         TaskContext delegate)

Method Detail

getFiles

public Map<TaskId,Path> getFiles()

evaluateInternal

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

Specified by:

evaluateInternal in interface TaskContext

Overrides:

evaluateInternal in class ForwardingTaskContext

invokeProcessFn

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

Specified by:

invokeProcessFn in interface TaskContext

Overrides:

invokeProcessFn in class ForwardingTaskContext

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)

taskFile

private Path taskFile(TaskId taskId)