Java™ How To Program (Early Objects), Tenth Edition

Class BlockingBuffer

Figures 23.14–23.15 demonstrate a Producer and a Consumer accessing an ArrayBlockingQueue. Class BlockingBuffer (Fig. 23.14) uses an ArrayBlockingQueue object that stores an Integer (line 7). Line 11 creates the ArrayBlockingQueue and passes 1 to the constructor so that the object holds a single value to mimic the UnsynchronizedBuffer example in Fig. 23.12. Lines 7 and 11 (Fig. 23.14) use generics, which we discussed in Chapters 16–20. We discuss multiple-element buffers in Section 23.8. Because our BlockingBuffer class uses the thread-safe ArrayBlockingQueue class to manage all of its shared state (the shared buffer in this case), BlockingBuffer is itself thread safe, even though we have not implemented the synchronization ...