synchronized block around mac var test/set
synchronized block around mac var test/set

Rupesh029/typica,onerandomgig/typica,manishsat/typica,google-code-export/typica,online-java-training/typica,rajatdt/typica,maheshwarirohit87/typica,asolfre/typica,canwe/typica,MrYoung3/typica