Terracotta 10.5 | TCStore API Developer Guide | Reference | Operations | Asynchronous API
 
Asynchronous API
TCStore provides an asynchronous API based around the Java 9 CompletionStage API.

AsyncDatasetWriterReader<String> asyncAccess = counterAccess.async(); // <1>
Operation<Boolean> addOp = asyncAccess.add("counter10", counterCell.newCell(10L)); // <2>
Operation<Optional<Record<String>>> getOp =
addOp.thenCompose((b) -> asyncAccess.get("counter10")); // <3>
Operation<Void> acceptOp = getOp.thenAccept(or -> or.ifPresent( // <4>
r -> out.println("The record with key " + r.getKey() + " was added")));

try {
acceptOp.get(); // <5>
} catch (InterruptedException | ExecutionException e) {
e.printStackTrace();
}
1
The asynchronous API is accessed through the async() method on an existing reader or writer-reader.
2
Methods then create asynchronous executions represented by Operation instances.
3
Operations can be composed with other operations using the usual CompletionStage methods.
4
Operations can also be composed with synchronous operations still yielding Operation instances.
5
Operation also extends Future for easy interoperability with synchronous code.
The current asynchronous implementation is a simple thread-pool based skin over the synchronous API. It is not currently interacting optimally with the asynchronous nature of the underlying Terracotta platform.

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