Startup delay due to ExtensionManager
-------------------------------------
Key: FELIX-388
URL: https://issues.apache.org/jira/browse/FELIX-388
Project: Felix
Issue Type: Improvement
Components: Framework
Reporter: Felix Meschberger
The ExtensionManager creates its own URL using itself as the URLStreamHandler.
The URL is inserted into the URL ClassLoader launching the framework. If a
resource is to be found using this URL, the equals method is called which
causes the host name of the URL (extension) to be resolved by
InetAddress.getByName(name).
As the host is not in any DNS (most probably) and the name does not matter
anyway, resolution of the host name seems to be overkill and just delay
operation. To prevent this lookup, I propose to overwrite the
URLStreamHandler.getHostAddress(URL) in the ExtensionManager to just
immediately return null:
Index:
/usr/src/felix/trunk/framework/src/main/java/org/apache/felix/framework/ExtensionManager.java
===================================================================
---
/usr/src/felix/trunk/framework/src/main/java/org/apache/felix/framework/ExtensionManager.java
(revision 581194)
+++
/usr/src/felix/trunk/framework/src/main/java/org/apache/felix/framework/ExtensionManager.java
(working copy)
@@ -20,6 +20,7 @@
import java.io.IOException;
import java.io.InputStream;
+import java.net.InetAddress;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;
@@ -566,4 +567,10 @@
m_extensions.add(extension);
}
}
+
+ protected InetAddress getHostAddress( URL u )
+ {
+ // the extension URLs do not address real hosts
+ return null;
+ }
}
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