Simple .NET/ASP.NET PDF document editor web control SDK

As mentioned earlier, starting with Oracle 10g, the cache architecture just discussed was deprecated. It has been replaced by a more powerful, JDBC 3.0 compliant implicit connection caching. The highlights of implicit connection caching are Transparent access to a connection cache at the data source level. Support for connections with different usernames and passwords in the same cache. Ability to control cache behavior by defining a set of cache properties. The supported properties include ones that set timeouts, the maximum number of physical connections, and so on. Ability to retrieve a connection based on user-defined connection attributes (a feature known as connection striping). Ability to use callbacks to control cache behavior When a connection is returned to the cache. When a connection has been abandoned. When an application requests a connection that does not exist in the cache. The new class OracleConnectionCacheManager is provided for administering the connection cache. With the new cache architecture, you can turn on connection caching simply by invoking setConnectionCachingEnabled( true ) on an OracleDataSource object. After caching is turned on, the first connection request to OracleDataSource implicitly creates a connection cache. There is a one-to-one mapping between the OracleDataSource object and its implicit connection cache.

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This step should be familiar to you by now: OracleDataSource ods = new OracleDataSource(); ods.setURL ( "jdbc:oracle:thin:@rmenon-pc:1521:ora10g" ); ods.setUser("scott"); // username ods.setPassword("tiger"); // password

Regular expressions can also be used to split strings: > (regex " ").Split("This is a string");; val it : string [] = [|"This"; "is"; "a"; "string"|] Here we have used the regular expression " " for whitespace. In reality, you probably want to use the regular expression " +" to match multiple spaces. Better still, you can match any Unicode whitespace character using \s, including end-of-line markers; however, when using escape characters, you will want to use verbatim strings to specify the regular expression, such as @"\s+". We discussed verbatim strings in 3. Let s try this: > (regex @"\s+").Split("I'm a little teapot");; val it : string [] = [|"I'm"; "a"; "little"; "teapot"|] > (regex @"\s+").Split("I'm a little \t\t\n\t\n\t teapot");; val it : string [] = [|"I'm"; "a"; "little"; "teapot"|] Here s how to match by using the method Match instead of using =~ and IsMatch. This lets you examine the positions of a match. > let m = (regex @"joe").Match("maryjoewashere");; val m : Match > if m.Success then printfn "Matched at position %d" m.Index;; Matched at position 4 val it : unit = () Replacing text is also easy: > let text = "was a dark and stormy night";; val text: string > let t2 = (regex @"\w+").Replace(text, "WORD");; val t2: string > t2;; val it : string = "WORD WORD WORD WORD WORD WORD" Here we ve used the regular expression "\w+" for a sequence of word characters.

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You turn on the connection cache by simply invoking setConnectionCachingEnabled() on the OracleDataSource object: ods.setConnectionCachingEnabled( true );

Characters other than . $ ^ { [ ( | ) * + \ match themselves. Matches any character, except \n. If RegexOptions.SingleLine is specified, then it matches every character. Matches any of the given characters or character ranges. Any character other than the given characters of character ranges. Matches any character in the named character class specified by {name}. See the .NET documentation for full details. Matches text not included in groups and block ranges specified in {name}. Matches any word character. Matches any nonword character. Matches any whitespace character. Matches any nonwhitespace character. Matches any decimal digit. Matches any nondigit. Matches a bell (alarm) \u0007. Matches a backspace \u0008 if in a [] character class; otherwise, in a regular expression, \b denotes a word boundary (between \w and \W characters). In a replacement pattern, \b always denotes a backspace. Matches a tab \u0009. Matches a carriage return \u000D. Matches a vertical tab \u000B. Matches a form feed \u000C. Matches a new line \u000A. Matches an escape \u001B. Matches a back reference. Matches an ASCII character as octal. Matches an ASCII character using hexadecimal representation (exactly two digits). Matches an ASCII control character; for example, \cC is Ctrl+C. Matches a Unicode character using hexadecimal representation (exactly four digits). When followed by a character that is not recognized as an escaped character, matches that character. For example, \* is the same as \x2A.

You can optionally set connection properties listed later in this section by either using the method setConnectionCacheProperties() of the OracleDataSource object, or using the OracleConnectionCacheManager API to create or reinitialize the connection cache as discussed later. For example, the following code sets three properties of the connection cache using the setConnectionCacheProperties() method of the OracleDataSource object: Properties cacheProperties = new Properties(); cacheProperties.setProperty( "InitialLimit", "2" ); cacheProperties.setProperty( "MinLimit", "3" ); cacheProperties.setProperty( "MaxLimit", "15" ); ods.setConnectionCacheProperties(cacheProperties); By setting connection cache properties, you can control the characteristics of the connection cache.

Does not consume web server resources Does not increase request or response size Can be configured to work in a Web Farm

\t \r \v \f \n \e \digit \040 \x20 \cC \u0020 \