Hi Jim, I have one question. I see Hotspot already supports in decompressing compressed resource and there is a method newCompressedResource in jdk/src/java.base/share/classes/jdk/internal/jimage/ResourcePool.java for creating a compressed resource but I did not find any API uses this method and not find there is any compressed resource in bootmodules.jimage.
What I want to know is 1. if I want to compress one resource in a certain module what are the steps? I assume I need write some code which first gets the plugin and compressed buffer and then pass to newCompressedResource? If there is some compressed zip or jar files in a certain module how the relevant code deals with this condition? 2. Any plan that bootmodules.jiamge or other jimage files will contain such compressed resources? Thanks a lot! 2015-06-18 8:08 GMT+08:00 Jim Laskey (Oracle) <james.las...@oracle.com>: > https://bugs.openjdk.java.net/browse/JDK-8080511 > > This is an long overdue refresh of the jimage support in the JDK9-dev > repo. This includes native support for reading jimage files, improved > jrt-fs (java runtime file system) support for retrieving modules and > packages from the runtime, and improved performance for langtools in the > presence of jrt-fs. > > http://cr.openjdk.java.net/~jlaskey/hs-rt-jimage/webrev-top < > http://cr.openjdk.java.net/~jlaskey/hs-rt-jimage/webrev-top> > http://cr.openjdk.java.net/~jlaskey/hs-rt-jimage/webrev-jdk < > http://cr.openjdk.java.net/~jlaskey/hs-rt-jimage/webrev-jdk> > http://cr.openjdk.java.net/~jlaskey/hs-rt-jimage/webrev-hotspot < > http://cr.openjdk.java.net/~jlaskey/hs-rt-jimage/webrev-hotspot> > http://cr.openjdk.java.net/~jlaskey/hs-rt-jimage/webrev-langtools < > http://cr.openjdk.java.net/~jlaskey/hs-rt-jimage/webrev-langtools> > > > Details: > > - jrt-fs provides access, via the nio FileSystem API, to the classes in a > .jimage file, organized by module or by package. > - Shared code for jimage support converted to native. Currently residing > in hotspot, but will migrate to it’s own jdk library > https://bugs.openjdk.java.net/browse/JDK-8087181 < > https://bugs.openjdk.java.net/browse/JDK-8087181> > - A new archive abstraction for class/resource sources. > - java based implementation layer for jimage reading to allow backport to > JDK8 (jrt-fs.jar - IDE support.) > - JNI support for jimage into hotspot. > - White box tests written to exercise native jimage support. > >