acquires a write lock . this will block other readers and writers on this entry only , and other readers and writers will need to be cleared before the write lock can be acquired , unless it is the same thread attempting to read or write . concode_field_sep Map cache concode_elem_sep ReadWriteLock lock concode_elem_sep Object value concode_field_sep Object getValue concode_elem_sep void writeUnLock concode_elem_sep void writeUnLock concode_elem_sep boolean containsKey concode_elem_sep void setValue concode_elem_sep Object get concode_elem_sep void clear concode_elem_sep Set<Object> getKeys concode_elem_sep ObjectCacheEntry getEntry concode_elem_sep void put concode_elem_sep void remove concode_elem_sep Object peek concode_elem_sep Object peek
boolean function ( ) { lock . writeLock ( ) . lock ( ) ; return true ; }