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julienrf / play-jsmessages

Library to compute localized messages of your Play application on client side

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1.2: Compiler error and runtime error

joscha opened this issue · comments

commented

Hi,

I upgraded from 1.1 to 1.2 and get the following message while compilation:

[warn] warning: jsmessages/JsMessages.class(jsmessages:JsMessages.class): major version 51 is newer than 50, the highest major version supported by this compiler.
[warn] It is recommended that the compiler be upgraded.
[warn] 1 warning
[warn] Problem processing dependencies of source /Users/joscha/bla/app/controllers/Application.java : java.lang.UnsupportedClassVersionError: jsmessages/JsMessages : Unsupported major.minor version 51.0

and then at runtime:

play.core.ActionInvoker$$anonfun$receive$1$$anon$1: Execution exception [[UnsupportedClassVersionError: jsmessages/JsMessages : Unsupported major.minor version 51.0]]
    at play.core.ActionInvoker$$anonfun$receive$1.apply(Invoker.scala:134) [play_2.9.1.jar:2.1-SNAPSHOT]
    at play.core.ActionInvoker$$anonfun$receive$1.apply(Invoker.scala:115) [play_2.9.1.jar:2.1-SNAPSHOT]
    at akka.actor.Actor$class.apply(Actor.scala:311) [akka-actor-2.0.1.jar:2.0.1]
    at play.core.ActionInvoker.apply(Invoker.scala:113) [play_2.9.1.jar:2.1-SNAPSHOT]
    at akka.actor.ActorCell.invoke(ActorCell.scala:619) [akka-actor-2.0.1.jar:2.0.1]
    at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:196) [akka-actor-2.0.1.jar:2.0.1]
Caused by: java.lang.UnsupportedClassVersionError: jsmessages/JsMessages : Unsupported major.minor version 51.0
    at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.6.0_31]
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) ~[na:1.6.0_31]
    at java.lang.ClassLoader.defineClass(ClassLoader.java:615) ~[na:1.6.0_31]
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) ~[na:1.6.0_31]
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) ~[na:1.6.0_31]
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58) ~[na:1.6.0_31]

Was 1.2 compiled with Java 7 by any chance?

commented

Indeed I’m compiling with JDK 1.7.
When I try to use -source 1.6 -target 1.6 options I get the following warning:

[warn] warning: [options] bootstrap class path not set in conjunction with -source 1.6

I have no idea where it could come from…

commented

From http://docs.oracle.com/javase/7/docs/technotes/tools/solaris/javac.html:

You must specify the -bootclasspath option to specify the correct version of the bootstrap classes (the rt.jar library). If not, the >compiler generates a warning:

% javac -source 1.6 OldCode.java
warning: [options] bootstrap class path not set in conjunction with -source 1.6

If you do not specify the correct version of bootstrap classes, the compiler will use the old language rules (in this example, it >will use version 1.6 of the Java programming language) combined with the new bootstrap classes, which can result in class >files that do not work on the older platform (in this case, Java SE 6) because reference to non-existent methods can get >included.

commented

The right way to do it is also on that page and seems to be like this:

% javac -source 1.6 -target 1.6 -bootclasspath jdk1.6.0/lib/rt.jar
-extdirs "" OldCode.java

commented

Any luck on this, because if I understand it correctly, using Java 1.7 with Play 2.x and 2.1-SNAPSHOT is still discouraged, so that basically means people would need to use play-jsmessages 1.1 until 1.7 is officially cleared for play 2.x, right?

commented

Ok, I’ll try to get 1.6 compatibility.

commented

Can you tell me if it’s ok with 1.2.1?

commented

like a charm :-) Thank you!