impala::JniLocalFrame Class Reference

#include <jni-util.h>

Collaboration diagram for impala::JniLocalFrame:

Public Member Functions
	JniLocalFrame ()
	~JniLocalFrame ()
Status	push (JNIEnv *env, int max_local_ref=10)

Private Attributes
JNIEnv *	env_

Detailed Description

Utility class to push/pop a single JNI frame. "push" will push a JNI frame and the d'tor will pop the JNI frame. Frames establish a scope for local references. Local references go out of scope when their frame is popped, which enables the GC to clean up the corresponding objects.

Definition at line 133 of file jni-util.h.

Constructor & Destructor Documentation

impala::JniLocalFrame::JniLocalFrame ( )

inline

Definition at line 135 of file jni-util.h.

impala::JniLocalFrame::~JniLocalFrame ( )

inline

Definition at line 136 of file jni-util.h.

References env_.

Member Function Documentation

Status impala::JniLocalFrame::push	(	JNIEnv *	env,
		int	max_local_ref = 10
	)

Pushes a new JNI local frame. The frame can support max_local_ref local references. The number of local references created inside the frame might exceed max_local_ref, but there is no guarantee that memory will be available. Push should be called at most once.

Definition at line 34 of file jni-util.cc.

References env_, and impala::Status::OK.

Referenced by CallJniMethod(), impala::JniUtil::CallJniMethod(), Planner::GeneratePlan(), impala::Catalog::GetAllCatalogObjects(), impala::Catalog::GetCatalogVersion(), impala::HBaseTableScanner::GetCurrentValue(), impala::HBaseTableScanner::HandleResultScannerTimeout(), impala::HBaseTable::Init(), impala::ExternalDataSourceExecutor::Init(), impala::HBaseTableScanner::InitScanRange(), Java_com_cloudera_impala_service_FeSupport_NativeEvalConstExprs(), impala::HBaseTableScanner::Next(), impala::HiveUdfCall::Open(), impala::HBaseTableScanner::ScanSetup(), impala::Frontend::SetCatalogInitialized(), and impala::Frontend::ValidateSettings().

Member Data Documentation

JNIEnv* impala::JniLocalFrame::env_

private

Definition at line 145 of file jni-util.h.

Referenced by push(), and ~JniLocalFrame().

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The documentation for this class was generated from the following files:

• be/src/util/jni-util.h
• be/src/util/jni-util.cc