Patterns in JavaTM, Volume 3 Java Enterprise Java Enterprise Design Patterns phần 5 potx

... 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 407 Stale Object 4 13 Type Conversion 4 23 IsDirty 431 Lazy Retrieval 439 Appendix ... 28 Chapter 3 The Software Life Cycle 29 Chapter 4 Transaction Patterns 33 Acid Transaction 37 Composite Transaction 55 Two Phase Commit 65 Audit Trail 75...

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 ... FOUR Transaction Patterns ■ 45 wrapper objects are simply discarded. The class diagram in Figure 4 .3 shows this sort of design. In this design, the objects that th...

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... collaboration are worth examining in greater detail. Completion of Pending Calls It may be possible for the new instance to finish what the old instance started if everything it needs to finish is copied ... 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 R...

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 ... read(byte[], int, int) The read method uses the readInt method to read the byte counts that the server inserts into the data stream. private final int readInt() throws IOException { In...

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... 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...

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... 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

... String name = rs.getString(2); String cuisine = rs.getString (3) ; // Create the <code>Restaurant</code> object. thisRestaurant = new Restaurant(id); thisRestaurant.setCuisine(cuisine); thisRestaurant.setMinPrice(minDollarAmt); ... represented in in-memory objects and in a database. This helps ensure that the conversion between in- memory and database representations of d...

Ngày tải lên: 14/08/2014, 02:20

... pattern, 32 5 33 5 and Cache Management pattern (described in vol. 1), 33 4 33 5 and Heavyweight/Lightweight pattern, 33 5 and Scheduler pattern (described in vol. 1), 33 5 Essential use case, 31 F Facade ... Programs (Cunningham and Beck), 5 V Variable, 7, 8 Versioned Object pattern, 35 5 37 1, 38 6 and Time Server pattern, 35 4, 37 1 and Virtual Proxy pattern (desc...

Ngày tải lên: 14/08/2014, 02:20