Eclipse
/
jetty.project
mirror of https://github.com/jetty/jetty.project.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Code cleanups.

This commit is contained in:
Simone Bordet 2016-08-08 23:22:51 +02:00
parent f695d9cf31
commit 1a88dfa8c0
1 changed files with 25 additions and 55 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

80
jetty-util/src/main/java/org/eclipse/jetty/util/thread/Invocable.java
View File

@ -21,15 +21,21 @@ package org.eclipse.jetty.util.thread;
import java.util.concurrent.Callable;
/**
* An object (typically either a {@link Runnable} or {@link Callable}
* that can declare how it will behaive when invoked: blocking, non-blocking
* or either.
*
* <p>A task (typically either a {@link Runnable} or {@link Callable}
* that declares how it will behave when invoked:</p>
* <ul>
* <li>blocking, the invocation will certainly block (e.g. performs blocking I/O)</li>
* <li>non-blocking, the invocation will certainly <strong>not</strong> block</li>
* <li>either, the invocation <em>may</em> block</li>
* </ul>
*/
public interface Invocable
{
enum InvocationType { BLOCKING, NON_BLOCKING, EITHER };
enum InvocationType
{
BLOCKING, NON_BLOCKING, EITHER
}
static ThreadLocal<Boolean> __nonBlocking = new ThreadLocal<Boolean>()
{
@Override
@ -38,7 +44,7 @@ public interface Invocable
return Boolean.FALSE;
}
};
public static boolean isNonBlockingInvocation()
{
return __nonBlocking.get();
@ -58,34 +64,16 @@ public interface Invocable
__nonBlocking.set(was_non_blocking);
}
}
public static void invokeOnlyNonBlocking(Runnable task)
{
switch(getInvocationType(task))
{
case BLOCKING:
throw new IllegalArgumentException("Cannot invoke nonblocking: "+task);
case NON_BLOCKING:
task.run();
break;
case EITHER:
// a Choice exists, so we must indicate NonBlocking
invokeNonBlocking(task);
break;
}
}
public static void invokePreferNonBlocking(Runnable task)
{
switch(getInvocationType(task))
switch (getInvocationType(task))
{
case BLOCKING:
case NON_BLOCKING:
task.run();
task.run();
break;
case EITHER:
// a Choice exists, so we must indicate NonBlocking
invokeNonBlocking(task);
@ -95,66 +83,48 @@ public interface Invocable
public static void invokePreferred(Runnable task, InvocationType preferredInvocationType)
{
switch(getInvocationType(task))
switch (getInvocationType(task))
{
case BLOCKING:
case NON_BLOCKING:
task.run();
task.run();
break;
case EITHER:
if (getInvocationType(task)==InvocationType.EITHER && preferredInvocationType==InvocationType.NON_BLOCKING)
if (getInvocationType(task) == InvocationType.EITHER && preferredInvocationType == InvocationType.NON_BLOCKING)
invokeNonBlocking(task);
else
task.run();
break;
}
}
public static Runnable asPreferred(Runnable task, InvocationType preferredInvocationType)
{
switch(getInvocationType(task))
switch (getInvocationType(task))
{
case BLOCKING:
case NON_BLOCKING:
break;
case EITHER:
if (getInvocationType(task)==InvocationType.EITHER && preferredInvocationType==InvocationType.NON_BLOCKING)
return new Runnable()
{
@Override
public void run()
{
invokeNonBlocking(task);
}
};
if (getInvocationType(task) == InvocationType.EITHER && preferredInvocationType == InvocationType.NON_BLOCKING)
return () -> invokeNonBlocking(task);
break;
}
return task;
}
public static void invokePreferBlocking(Runnable task)
{
task.run();
}
public static InvocationType getInvocationType(Object o)
{
if (o instanceof Invocable)
return ((Invocable)o).getInvocationType();
return InvocationType.BLOCKING;
}
default InvocationType getInvocationType()
{
return InvocationType.BLOCKING;
}
}