In order to allow compression to work with EJB 2.x invocations I created my own
Compression marshaller and unmarshaller which descend from original classes.
The default constructor for both classes now call the constructor that takes
one parameter of type Marshaller/UnMarshaller with new
InvocationMarshaller()/InvocationUnMarshaller().
I also did new versions of read/write methods which I use to test different
variants for calling GZip streams.
>From my experiments I can tell that switching
oos.flush(); and gzos.finish();
does not help.
I'm still getting exceptions for incorrect version in the stream. But I also
found a solution which is in the code below.
In order to workaround the other problem with OutOfMemory exception I created
new GZip input/output stream classes that descend from the original Java
classes.
in my Output stream I added new finish method
public void finish() throws IOException
| {
| super.finish();
| def.end(); // This will release all resources used by zlib
| }
| }
in the input stream I added new method
public void end() throws IOException
| {
| while (available() > 0) { // This tell the gzip input stream to
read the extra trailer put by finish method in output stream. This all removes
the need to use buffered stream like in 2.x branch
| read();
| }
| inf.end();
| }
|
and I call this new method at the end of read method.
this way I can use original java GZip classes without having to relay on
external libraries.
- inf and def are protected fields in Java 1.5 and 1.6
If you want I can provide you with full source code so you can use it to create
the necessary updates in 2.x and 2.2 branches.
Doychin
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