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com.vaadin.signals.impl.
Package com.vaadin.signals.impl
Class SynchronousSignalTree
java.lang.Object
com.vaadin.signals.impl.SignalTree
com.vaadin.signals.impl.SynchronousSignalTree
A signal tree that immediately confirms commands without waiting for an
external system to determine command ordering. This means that
confirmed() and submitted() return the same value. This
type of tree is intended for signals that are used only within a single JVM.
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Nested Class Summary
Nested classes/interfaces inherited from class com.vaadin.signals.impl.SignalTree
SignalTree.PendingCommit, SignalTree.Type -
Constructor Summary
ConstructorsConstructorDescriptionSynchronousSignalTree(boolean computedSignal) Creates a new synchronous signal tree.
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Method Summary
Modifier and TypeMethodDescriptionGets the current snapshot based on all confirmed commands.
prepareCommit(CommandsAndHandlers changes) Starts the process of committing a set of changes.
Gets the current snapshot based on all confirmed and submitted commands.
Methods inherited from class com.vaadin.signals.impl.SignalTree
commitSingleCommand, commitSingleCommand, getLock, getWithLock, hasLock, id, notifyObservers, notifyProcessedCommandSubscribers, observeNextChange, runWithLock, subscribeToProcessed, type, wrapWithLock
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Constructor Details
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SynchronousSignalTree
public SynchronousSignalTree(boolean computedSignal) Creates a new synchronous signal tree.
Parameters:
computedSignal-trueif the tree is used for backing a computed signal,falseif it's a standalone tree
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Method Details
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confirmed
Description copied from class:
SignalTreeGets the current snapshot based on all confirmed commands. This snapshot does not contain changes from commands that have been submitted but not yet confirmed.
Specified by:
confirmedin classSignalTreeReturns:
the confirmed snapshot, not
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submitted
Description copied from class:
SignalTreeGets the current snapshot based on all confirmed and submitted commands.
Specified by:
submittedin classSignalTreeReturns:
the submitted snapshot, not
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prepareCommit
Description copied from class:
SignalTreeStarts the process of committing a set of changes. The returned instance defines callbacks for continuing the commit procedure.
Note that this method expects that the caller has acquired the tree lock prior to calling the method and that the lock will remain acquired while interacting with the returned object.
Specified by:
prepareCommitin classSignalTreeParameters:
changes- the changes to commit, notnullReturns:
callbacks for coordinating the rest of the commit sequence, not
null
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