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authorAlexander Kriegisch <Alexander@Kriegisch.name>2024-01-04 08:29:34 +0700
committerAlexander Kriegisch <Alexander@Kriegisch.name>2024-01-06 10:09:11 +0100
commitf7962810eca3ddda75d64b85caab2449eeff480e (patch)
tree1c6b31641f1e0b714afbb699cebfd1da3ccf96f8 /docs/dist/doc/README-190.adoc
parent0065b755292708d6fd27c067564ecef2b10ede04 (diff)
downloadaspectj-f7962810eca3ddda75d64b85caab2449eeff480e.tar.gz
aspectj-f7962810eca3ddda75d64b85caab2449eeff480e.zip
Bulk-rename release read-me files to version numbers with dots
Also rename references. E.g. - RELEASE-11 -> RELEASE-1.1 - RELEASE-1810 -> RELEASE-1.8.10 - RELEASE-1921 -> RELEASE-1.9.21 Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>
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-== AspectJ 1.9.0
-
-_© Copyright 2018 Contributors. All rights reserved._
-
-The full list of resolved issues in 1.9.0 is available
-https://bugs.eclipse.org/bugs/buglist.cgi?bug_status=RESOLVED&bug_status=VERIFIED&bug_status=CLOSED&f0=OP&f1=OP&f3=CP&f4=CP&j1=OR&list_id=16866879&product=AspectJ&query_format=advanced&target_milestone=1.9.0[here]
-
-_Release info: 1.9.0 available 2-Apr-2018_
-
-=== Improved runtime interface
-
-New factory methods have been added to the AspectJ runtime. This is an
-attempt to more optimally create `thisJoinPoint` and
-`thisEnclosingJoinPoint` objects. The generated code that invokes these
-now also uses the ability for the `LDC` bytecode instruction to load class
-constants directly (this replaces what was happening previously where
-generated code referenced string class names and class-loading was being
-done from the AspectJ runtime as the woven application was starting).
-
-This is turned on by using `-Xajruntimetarget:1.9`. This option was used
-previously to enable users to target an old runtime if they knew that
-old runtime is all that was available at some deployed target. The new
-generation mechanism is not the default, not until it has had a bit more
-testing out in the wild.
-
-The changes to generated code have a couple of potential side effects:
-
-* *overall size*: the woven code may be smaller due to the use of
-smaller string constant pieces in the generated code (previously strings
-were smashed together in the generated code and then taken apart by
-AspectJ at runtime). Since the pieces are smaller, they can be shared
-across other uses in the class file.
-* *method size*: although the overall class may be smaller there are
-more instructions involved in preparing the data for invocation of the
-new joinpoint factory methods. It is possible if you have a lot of
-joinpoints that we might blow the 64k instruction limit for the
-`ajc$preClinit` method (where the factory invocation code is generated).
-Please provide feedback if this happens to you!
-
-In anticipation of not all build plugins supporting that
-`-Xajruntimetarget` option, you can now specify these kinds of option in
-the `ASPECTJ_OPTS` environment variable. Set that in your environment:
-
-[source, text]
-....
-export ASPECTJ_OPTS="-Xajruntimetarget:1.9"
-....
-
-And it should get picked up by AspectJ when it runs.
-
-== AspectJ 1.9.0.RC4
-
-_Release info: 1.9.0.RC4 available 21-Feb-2018_
-
-Primary changes in RC4 are to add support for `<compilerArg>` in the Ant
-task. This enables users of the Ant task to pass in options supported by
-the underlying AspectJ but not yet surfaced elsewhere. Particularly
-useful with Java9 which includes a number of module related commands.
-For example, here is an `iajc` usage with `compilerArg` that is passing
-`--add-modules java.xml.bind`:
-
-[source, xml]
-....
-<iajc destdir="bin" failonerror="true"
- showWeaveInfo="true" source="1.9" target="1.9"
- debug="true" fork="true" maxmem="256m">
-
- <compilerArg value="--add-modules"/>
- <compilerArg value="java.xml.bind"/>
- <src path="src" />
- <classpath>
- <pathelement location="${aspectj.home}/lib/aspectjrt.jar"/>
- </classpath>
-
-</iajc>
-....
-
-== AspectJ 1.9.0.RC3
-
-_Release info: 1.9.0.RC3 available 5-Feb-2018_
-
-Primary changes in RC3 are to upgrade JDT and pickup all the fixes for
-Java9 that have gone into it over the last few months.
-
-== AspectJ 1.9.0.RC2
-
-_Release info: 1.9.0.RC2 available 9-Nov-2017_
-
-Key change in 1.9.0.RC2 is actually to be more tolerant of JDK10. The
-version handling has been somewhat overhauled so AspectJ 9 will behave
-better on Java 10 and future JDKs. This should put AspectJ in a better
-place if new JDK versions are going to arrive thick and fast.
-
-== AspectJ 1.9.0.RC1
-
-_Release info: 1.9.0.RC1 available 20-Oct-2017_
-
-This is the first release candidate of AspectJ 1.9.0 - the version of
-AspectJ to be based on Java9. It includes a recent version of the
-Eclipse Java9 compiler (from jdt core, commit #062ac5d7a6bf9).
-
-=== Automatic Modules
-
-AspectJ can now be used with the new module system available in Java9.
-The key jars in AspectJ have been given automatic module names. The
-automatic module name is `org.aspectj.runtime` for the `aspectjrt` module:
-
-[source, text]
-....
-$ java --module-path <pathto>/lib/aspectjrt.jar --list-modules | grep aspectj
-
-org.aspectj.runtime file:///<pathto>/lib/aspectjrt.jar automatic
-....
-
-And similarly `org.aspectj.weaver` and `org.aspectj.tools` for `aspectjweaver`
-and `aspectjtools`, respectively:
-
-[source, text]
-....
-$ java --module-path <pathto>/lib/aspectjweaver.jar --describe-module org.aspectj.weaver
-
-org.aspectj.weaver file:///<pathto>/lib/aspectjweaver.jar automatic
-requires java.base mandated
-contains aj.org.objectweb.asm
-contains aj.org.objectweb.asm.signature
-contains org.aspectj.apache.bcel
-contains org.aspectj.apache.bcel.classfile
-contains org.aspectj.apache.bcel.classfile.annotation
-contains org.aspectj.apache.bcel.generic
-contains org.aspectj.apache.bcel.util
-contains org.aspectj.asm
-contains org.aspectj.asm.internal
-...
-....
-
-=== Building woven modules
-
-AspectJ understands `module-info.java` source files and building modules
-that include aspects. Here is an example:
-
-[source, java]
-....
-// module-info.java
-
-module demo {
- exports pkg;
- requires org.aspectj.runtime;
-}
-
-// pkg/Demo.java
-
-package pkg;
-
-public class Demo {
- public static void main(String[] argv) {
- System.out.println("Demo running");
- }
-}
-
-// otherpkg/Azpect.java
-
-package otherpkg;
-
-public aspect Azpect {
- before(): execution(* *(..)) && !within(Azpect) {
- System.out.println("Azpect running");
- }
-}
-....
-
-We can now build those into a module:
-
-[source, text]
-....
-$ ajc -1.9 module-info.java otherpkg/Azpect.java pkg/Demo.java -outjar demo.jar
-
-...
-module-info.java:3 [error] org.aspectj.runtime cannot be resolved to a module
-...
-....
-
-Wait, that failed! Yes, `aspectjrt.jar` (which includes the required
-`org.aspectj.weaver` module) wasn't supplied. We need to pass it on the
-module-path:
-
-[source, text]
-....
-$ ajc -1.9 --module-path <pathto>/aspectjrt.jar module-info.java otherpkg/Azpect.java pkg/Demo.java -outjar demo.jar
-....
-
-Now we have a demo module we can run:
-
-[source, text]
-....
-$ java --module-path <pathto>/aspectjrt.jar:demo.jar --module demo/pkg.Demo
-
-Azpect running
-Demo running
-....
-
-That's it!
-
-=== Binary weaving with modules
-
-A module is really just a jar with a _module-info_ descriptor. As such, you
-can simply pass a module on the _inpath_ and binary-weave it with other
-aspects. Take the module we built above, let's weave into it again:
-
-[source, java]
-....
-// extra/AnotherAzpect.java
-
-package extra;
-
-public aspect AnotherAzpect {
- before(): execution(* *(..)) && !within(*Azpect) {
- System.out.println("AnotherAzpect running");
- }
-}
-....
-
-[source, text]
-....
-$ ajc -inpath demo.jar AnotherAzpect.java -outjar newdemo.jar
-....
-
-Notice how there was no complaint here that the `org.aspectj.runtime`
-module hadn't been passed in. That is because inpath was being used
-which doesn't treat specified jars as modules (and so does not check
-dependencies). There is no _module-inpath_ right now.
-
-Because the new JAR produced includes the compiled aspect, the
-_module-info_ specification inside is still correct, so we can run it
-exactly as before:
-
-[source, text]
-....
-$ java --module-path ~/installs/aspectj190rc1/lib/aspectjrt.jar:newdemo.jar --module demo/pkg.Demo
-
-Azpect running
-AnotherAzpect running
-Demo running
-....
-
-=== Faster Spring AOP
-
-Dave Syer recently created a https://github.com/dsyer/spring-boot-aspectj[series of benchmarks] for checking the speed
-of Spring-AspectJ.
-
-Here we can see the numbers for AspectJ 1.8.11 (on an older Macbook
-Pro):
-
-[source, text]
-....
-Benchmark (scale) Mode Cnt Score Error Units
-StartupBenchmark.ltw N/A avgt 10 2.553 ~ 0.030 s/op
-StartupBenchmark.ltw_100 N/A avgt 10 2.608 ~ 0.046 s/op
-StartupBenchmark.spring v0_10 avgt 10 2.120 ~ 0.148 s/op
-StartupBenchmark.spring v1_10 avgt 10 2.219 ~ 0.066 s/op
-StartupBenchmark.spring v1_100 avgt 10 2.244 ~ 0.030 s/op
-StartupBenchmark.spring v10_50 avgt 10 2.950 ~ 0.026 s/op
-StartupBenchmark.spring v20_50 avgt 10 3.854 ~ 0.090 s/op
-StartupBenchmark.spring v20_100 avgt 10 4.003 ~ 0.038 s/op
-StartupBenchmark.spring a0_10 avgt 10 2.067 ~ 0.019 s/op
-StartupBenchmark.spring a1_10 avgt 10 2.724 ~ 0.023 s/op
-StartupBenchmark.spring a1_100 avgt 10 2.778 ~ 0.057 s/op
-StartupBenchmark.spring a10_50 avgt 10 7.191 ~ 0.134 s/op
-StartupBenchmark.spring a10_100 avgt 10 7.191 ~ 0.168 s/op
-StartupBenchmark.spring a20_50 avgt 10 11.541 ~ 0.158 s/op
-StartupBenchmark.spring a20_100 avgt 10 11.464 ~ 0.157 s/op
-....
-
-So this is the average startup of an app affected by aspects applying to
-the beans involved. Where numbers are referenced the first is the number
-of aspects/pointcuts and the second is the number of beans. The 'a'
-indicates an annotation based pointcut vs a non-annotation based
-pointcut ('v'). Notice things are much worse for annotation based
-pointcuts. At 20 pointcuts and 50 beans the app is 9 seconds slower to
-startup. +
-
-In AspectJ 1.8.12 and 1.9.0.RC1 some work has been done here. The key
-change is to recognize that the use of annotations with runtime
-retention is much more likely than annotations with class level
-retention. Retrieving annotations with class retention is costly because
-we must open the bytes for the class file and dig around in there (vs
-runtime retention which are immediately accessible by reflection on the
-types). In 1.8.11 the actual type of the annotation involved in the
-matching is ignored and the code will fetch *all* the annotations on the
-type/method/field being matched against. So even if the match is looking
-for a runtime retention annotation, we were doing the costly thing of
-fetching any class retention annotations. In 1.8.12/1.9.0.RC1 we take
-the type of the match annotation into account - allowing us to skip
-opening the classfiles in many cases. There is also some deeper work on
-activating caches that were not previously being used correctly but the
-primary change is factoring in the annotation type.
-
-What difference does that make? AspectJ 1.9.0.RC1:
-
-[source, text]
-....
-Benchmark (scale) Mode Cnt Score Error Units
-StartupBenchmark.ltw N/A avgt 10 2.568 ~ 0.035 s/op
-StartupBenchmark.ltw_100 N/A avgt 10 2.622 ~ 0.075 s/op
-StartupBenchmark.spring v0_10 avgt 10 2.096 ~ 0.054 s/op
-StartupBenchmark.spring v1_10 avgt 10 2.206 ~ 0.031 s/op
-StartupBenchmark.spring v1_100 avgt 10 2.252 ~ 0.025 s/op
-StartupBenchmark.spring v10_50 avgt 10 2.979 ~ 0.071 s/op
-StartupBenchmark.spring v20_50 avgt 10 3.851 ~ 0.058 s/op
-StartupBenchmark.spring v20_100 avgt 10 4.000 ~ 0.046 s/op
-StartupBenchmark.spring a0_10 avgt 10 2.071 ~ 0.026 s/op
-StartupBenchmark.spring a1_10 avgt 10 2.182 ~ 0.032 s/op
-StartupBenchmark.spring a1_100 avgt 10 2.272 ~ 0.024 s/op
-StartupBenchmark.spring a10_50 avgt 10 2.557 ~ 0.027 s/op
-StartupBenchmark.spring a10_100 avgt 10 2.598 ~ 0.040 s/op
-StartupBenchmark.spring a20_50 avgt 10 2.961 ~ 0.043 s/op
-StartupBenchmark.spring a20_100 avgt 10 3.093 ~ 0.098 s/op
-....
-
-Look at the a20_100 case - instead of impacting start time by 9 seconds,
-it impacts it by 1 second.
-
-=== More to come...
-
-* Eclipse JDT Java 9 support is still being actively worked on and lots
-of fixes will be coming through over the next few months and included in
-AspectJ 1.9.X revisions.
-
-* AspectJ does not currently modify `module-info.java` files. An aspect
-from one module applying to code in another module clearly introduces a
-dependency between those two modules. There is no reason - other than
-time! - that this can't be done.
-(https://bugs.eclipse.org/bugs/show_bug.cgi?id=526244[Issue 526244])
-
-* Related to that AspectJ, on detection of aspects should be able to
-automatically introduce the `requires org.aspectj.runtime` to the
-_module-info_. (https://bugs.eclipse.org/bugs/show_bug.cgi?id=526242[Issue
-526242])
-
-* Module-aware variants of AspectJ paths: `--module-inpath`,
-`--module-aspectpath`.
-(https://bugs.eclipse.org/bugs/show_bug.cgi?id=526243[Issue 526243])