Broken Java 1.6 target compliance.

[alex-vas]

The IdGenerator class appears to depend on ThreadLocalRandom JDKs class which is introduced in Java 1.7 only.

See the java docs: http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ThreadLocalRandom.html

We need to either bump up the java version in pom.xml or change to to use something like java.util.Random which is known to have poor performance.

See more on JDKs random generator performance comparisons: http://java-performance.info/java-util-random-java-util-concurrent-threadlocalrandom-multithreaded-environments/

I would vote for changing the code and runtime compliance requirements (Language Level) to 1.7 in the pom files. Not sure how it would affect Android developers though.