Class ResourceLimits

java.lang.Object

org.graalvm.polyglot.ResourceLimits

public final class ResourceLimits
extends Object

Represents resource limits configuration that is used to configure contexts. Resource limit instances are created using the builder and activated by enabling them for a context. All configured limits are applied per context instance. Resource limits may be reset. If a resource limit is triggered the context that triggered the limit will automatically be closed and can no longer be used to evaluate code.

The following resource limits are supported:

• Statement count limit per context. Allows to limit the amount of statements executed per context.

Statement Limit Example

ResourceLimits limits = ResourceLimits.newBuilder()
                      .statementLimit(500, null)
                  .build();
try (Context context = Context.newBuilder("js")
                           .resourceLimits(limits)
                       .build();) {
    try {
        context.eval("js", "while(true);");
        assert false;
    } catch (PolyglotException e) {
        // triggered after 500 iterations of while(true);
        // context is closed and can no longer be used
        assert e.isCancelled();
    }
}

Since:

19.3

See Also:

• newBuilder()

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
final class	ResourceLimits.Builder	A builder used to construct resource limits.

Method Summary

Modifier and Type	Method	Description
static ResourceLimits.Builder	newBuilder()	Creates a new builder to construct ResourceLimits instances.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

newBuilder

public static ResourceLimits.Builder newBuilder()

Creates a new builder to construct ResourceLimits instances.

Since:

19.3