On 12/08/2013 01:34 AM, Chris Hegarty wrote:
On 07/12/2013 18:12, Dan Xu wrote:
...
Just so I understand, did you use a JNI global when caching the
reference?
-Alan
Hi Alan,
What is a JNI global?
http://docs.oracle.com/javase/7/docs/technotes/guides/jni/spec/design.html#wp1242
> What I use here is a static global variable. I
have uploaded this file to
http://cr.openjdk.java.net/~dxu/8025437/DefaultProxySelector1.c. You can
search for "no_proxy". I have declared this variable as "static jobject'
at the beginning, and initialized it in function initJavaClass().
You can only store global, not local, refs across multiple
calls/contexts.
In your case it would look something like:
static jobject setNoProxy(JNIEnv *env) {
jobject empty_proxy = NULL;
jfieldID pr_no_proxyID = NULL;
pr_no_proxyID = (*env)->GetStaticFieldID(env,
proxy_class,
"NO_PROXY", "Ljava/net/Proxy;");
if (proxy_class && pr_no_proxyID) {
printf("create NO_PROXY\n");
empty_proxy = (*env)->GetStaticObjectField(env,
proxy_class, pr_no_proxyID);
empty_proxy = (*env)->NewGlobalRef(env, empty_proxy);
}
return empty_proxy;
}
-Chris.
Do you mean (*env)->GetStaticObjectField() return me a local reference?
When shall I call NewGlobalRef()? In Proxy.java, this static field has
already been created by "public final static Proxy NO_PROXY = new
Proxy();" And I still need call NewGlobalRef() to make it global, right?
But why is it not necessary for me to call NewGlobalRef() for
ptype_httpID and ptype_socksID? Thanks!
-Dan
