Patterns in JavaTM, Volume 3 Java Enterprise Java Enterprise Design Patterns phần 4 docx

... 34 7 Time Server 34 9 Versioned Object 35 5 Temporal Property 37 3 Chapter 9 Database Patterns 38 7 Persistence Layer 38 9 CRUD 40 7 Stale Object 4 13 Type Conversion 4 23 IsDirty 43 1 Lazy Retrieval 43 9 Appendix ... 1 Introduction to Software Patterns 1 Description of Patterns 2 Pattern Name 3 Synopsis 3 Context 3 Forces 3 Solution 4 Consequences 4 Implement...

Ngày tải lên: 14/08/2014, 02:20

... thing that you should do to ensure the consis- tency of a transaction is testing. The Unit Testing and System Testing patterns described in Patterns in Java, Volume 2 are useful in designing appropriate ... multiple write operations 48 ■ CHAPTER FOUR Transaction Patterns ■ 45 wrapper objects are simply discarded. The class diagram in Figure 4 .3 shows this sort of des...

Ngày tải lên: 14/08/2014, 02:20

... way of doing things and Java s way of doing things. Remote Method Invocation (RMI) is a Java- based Object Request Broker implementation that is part of the core Java API. Because RMI is Java- based, ... to proceed. 1 24 Some parts of this collaboration are worth examining in greater detail. Completion of Pending Calls It may be possible for the new instance to finish what the old ins...

Ngày tải lên: 14/08/2014, 02:20

... writing software for a new kind of smart food processor that turns raw ingredients into cooked, ready-to-eat food by slicing, dicing, mixing, boiling, baking, frying, and/or stirring the ingredients. ... CORBA naming service. Instead of binding names to proxies, it binds them to something called an Interoperable Object Reference (IOR). An IOR is a string that has, embedded in it, all of th...

Ngày tải lên: 14/08/2014, 02:20

... = this .in; int c1 = in. read(); int c2 = in. read(); int c3 = in. read(); int c4 = in. read(); if ((c1 | c2 | c3 | c4) < 0) throw new EOFException(); Distributed Computing Patterns ■ 227 3A. Call ... of data bytes in the incoming message. 4C .3. The Multiplexer object reads the data bytes in the incoming message into an internal buffer. 4C .4. The Multiplexer object passes its...

Ngày tải lên: 14/08/2014, 02:20

... object. InputStream in = actualSocket.getInputStream(); int otherBufferSize = new DataInputStream (in) .readInt(); BufferedInputStream bin; bin = new BufferedInputStream (in) ; actualIn = new DataInputStream(bin); // ... connection. 266 ■ CHAPTER SIX RELATED PATTERNS Singleton. The Singleton pattern (described in Volume 1) uses a single instance of a class for an entire program. The S...

Ngày tải lên: 14/08/2014, 02:20

... findInsertionIndex(node); expirations.add(insertionIndex, node); } // scheduleRemoval(LinkedList) /** * Determine where in a LinkedList an object belongs * based on expiration times. */ private int findInsertionIndex(LinkedList ... TransactionHistory by * putting its LinkedList object in an ArrayList that * is sorted by expiration time. */ synchronized void scheduleRemoval(LinkedList node...

Ngày tải lên: 14/08/2014, 02:20

... if int latestIndex = 0; Interval latestInterval = intervals[latestIndex]; for (int i=1; i<length; i++) { if (intervals[i].endsAfter(latestInterval)) { latestIndex = i; latestInterval = intervals[i]; Temporal ... if int latestIndex = 0; Interval latestInterval = intervals[latestIndex]; for (int i=1; i<length; i++) { if (intervals[i].endsAfter(latestInterval)) { latestIndex = i; latestInt...

Ngày tải lên: 14/08/2014, 02:20

... database. Database Patterns ■ 40 9 • It will throw an exception to indicate something about removing the object that would violate a business rule. • It will throw at least one other kind of exception to indicate ... accomplish this we would design these classes so that each instance of Traveler, PhoneNumber, and Preference has its own dirty flag. Database Patterns ■ 43 3 application...

Ngày tải lên: 14/08/2014, 02:20

... 5 D Database patterns, 38 7 4 43 CRUD pattern, 40 7 41 2 isDirty pattern, 43 1 – 43 8 Lazy Retrieval pattern, 43 9 4 43 Persistence Layer pattern, 38 9 40 6 Stale Object pattern, 4 13 42 1 Type Conversion pattern, 4 23 43 0 Data ... 9 Enterprise JavaBean, 39 7 Entity beans, 39 7 Ephemeral Cache Item pattern, 32 5 33 5 and Cache Management pattern (described in vol. 1),...

Ngày tải lên: 14/08/2014, 02:20