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package panda.task;
import java.util.concurrent.Callable;
import java.util.concurrent.Future;
/**
* Extended interface for asynchronous {@link TaskExecutor} implementations,
* offering an overloaded {@link #execute(Runnable, long)} variant with a start
* timeout parameter as well support for {@link java.util.concurrent.Callable}.
*
* Note: The {@link java.util.concurrent.Executors} class includes a set of
* methods that can convert some other common closure-like objects, for example,
* {@link java.security.PrivilegedAction} to {@link Callable} before executing them.
*
*
Implementing this interface also indicates that the {@link #execute(Runnable)}
* method will not execute its Runnable in the caller's thread but rather
* asynchronously in some other thread.
*
* @see java.util.concurrent.Callable
* @see java.util.concurrent.Executors
*/
public interface AsyncTaskExecutor extends TaskExecutor {
/** Constant that indicates immediate execution */
long TIMEOUT_IMMEDIATE = 0;
/** Constant that indicates no time limit */
long TIMEOUT_INDEFINITE = Long.MAX_VALUE;
/**
* Execute the given {@code task}.
* @param task the {@code Runnable} to execute (never {@code null})
* @param startTimeout the time duration (milliseconds) within which the task is
* supposed to start. This is intended as a hint to the executor, allowing for
* preferred handling of immediate tasks. Typical values are {@link #TIMEOUT_IMMEDIATE}
* or {@link #TIMEOUT_INDEFINITE} (the default as used by {@link #execute(Runnable)}).
*/
void execute(Runnable task, long startTimeout);
/**
* Submit a Runnable task for execution, receiving a Future representing that task.
* The Future will return a {@code null} result upon completion.
* @param task the {@code Runnable} to execute (never {@code null})
* @return a Future representing pending completion of the task
*/
Future submit(Runnable task);
/**
* Submit a Callable task for execution, receiving a Future representing that task.
* The Future will return the Callable's result upon completion.
* @param task the {@code Callable} to execute (never {@code null})
* @return a Future representing pending completion of the task
*/
Future submit(Callable task);
}