as2 connection

transferred from: http://www.cnblogs.com/heyonggang/p/3660600.html1. TCPConnectionWhen the TCP protocol is used in network communication, before the actual read and write operation, the server and the client must establish a connection, when the read and write operation is completed, the two sides no longer need the connection when they can release the connection

Implementation principleWhen the database connection pool is initialized, a certain number of database connections are created in the connection pool, and the number of these database connections is constrained by the minimum number of database connections. Regardless of whether these database connections are being used, the connection pool will always be guarant

Reference:Http://course.ccniit.com/CSTD/Linux/reference/files/018.PDFHttp://hi.baidu.com/raycomer/item/944d23d9b502d13be3108f61To establish a connection:Understanding: Windows and sliding windowsTraffic Control for TCPTCP uses window mechanism for flow control what is a window?When a connection is established, each end allocates a buffer to store the received data and send the buffer's dimensions to the other endThe acknowledgement sent by the receive

To establish a connection:Understanding: Windows and sliding windowsTraffic Control for TCPTCP uses window mechanism for flow control what is a window?When a connection is established, each end allocates a buffer to store the received data and send the buffer's dimensions to the other endThe acknowledgement sent by the receiver contains its own remaining buffer sizeThe number of remaining buffer spaces is called a window2. TCP's flow control process (

column title, it must be defined in the first query statement. To sort the Union query results, you must also use the column name, column title, or column number in the first query statement.　　When using the Union operator, ensure that there are the same number of expressions in the selection list of each joint query statement, and each query selection expression should have the same data type, or they can be automatically converted to the same data type. During automatic conversion, the system

Implementation Principle When the database connection pool is initialized, a certain number of database connections are created into the connection pool, which is restricted by the minimum number of database connections. Regardless of whether or not these database connections are used, the connection pool will always ensure that there are at least as many connec

Packagetk. dong. connection. util; importjava. io. IOException; importjava. io. inputStream; importjava. io. printWriter; importjava. lang. reflect. invocationHandler; importjava. lang. reflect. method; importjava. lang. reflect. proxy; importjava. SQL. conn Package tk. dong. connection. util; import java. io. IOException; import java. io. inputStream; import java. io. printWriter; import java. lang. reflec

Packagetk. dong. connection. util; importjava. io. IOException; importjava. io. inputStream; importjava. io. printWriter; importjava. SQL. array; importjava. SQL. blob; importjava. SQL. callableStatement; importjava. SQL. clob; importjava. SQL. connection; I Package tk. dong. connection. util; import java. io. IOException; import java. io. inputStream; import jav

Do not know the socket and TCP connection process, do not know the sockettcp connection Directory:1. Background2. Detailed connection Process Analysis2.1 socket () function2.2 bind () function2.3 listen () and connect () Functions2.3.1 in-depth analysis of listen ()2.3.2 influence of syn flood2.4 accept () function2.5 send () and recv () Functions2.6 close () and

JDBC connection pool technology, jdbc connection I. Connection Pool technology (1) the basic process of accessing the database through JDBC in Java is as follows: 1. Load the database driver; 2. Establish a database connection through JDBC; 3. Access the database and execute SQL statements; 4. Disconnect the database.

Ado|connection| object What is a connection object? A Connection object describes the physical connection to the data source. You can also use OLE DB to connect to a data source using ODBC. When you open a Connectiont object, you will attempt to connect to the database. The State property of the

1. The relationship between the HTTP protocol and the TCP/IP protocolLong connections and short connections to HTTP are essentially TCP long connections and short connections. HTTP belongs to the Application layer protocol, which uses the TCP protocol at the Transport Layer and IP protocol at the network layer. The IP protocol mainly solves the network routing and addressing problem, the TCP protocol mainly solves how to reliably pass the packet over the IP layer, so that the receiving end of th

1. The relationship between the HTTP protocol and the TCP/IP protocol Long connections and short connections to HTTP are essentially TCP long connections and short connections. HTTP belongs to the Application layer protocol, which uses the TCP protocol at the Transport Layer and IP protocol at the network layer. The IP protocol mainly solves the network routing and addressing problems, the TCP protocol mainly solves how to reliably pass the packet over the IP layer, so that all the packets sent

Tags: memcach runtime build open EMC data requires pre resolutionUnderstanding of database connection pool data Source pool 1. The database connection pool allows applications to reuse an existing database connection instead of re-establishing a connection, avoiding the resource and time spent by new

What are "persistent connections" and "Transient connections "? Interpretation 1 The so-called persistent connection means that the connection is maintained no matter whether or not it is used after a socket connection is established, but the security is poor; The so-called short connection means that the

In IntroductionC ++Before the internal connection and external connection in, describe some concepts. 1. Statement A declaration introduces a name into a scope; In c ++, it is legal to repeat a declaration in a scope. The following are declarations: Int foo (int, int); // function pre-declaration Typedef int Int; // typedef Declaration Class bar; // class pre-declaration Extern int g_var; // ext

　　1. The relationship between the HTTP protocol and the TCP/IP protocolLong connections and short connections to HTTP are essentially TCP long connections and short connections. HTTP belongs to the Application layer protocol, which uses the TCP protocol at the Transport Layer and IP protocol at the network layer. The IP protocol mainly solves the network routing and addressing problems, the TCP protocol mainly solves how to reliably pass the packet over the IP layer, so that all the packets sent

Recently, I have made frequent connections to the JSP database, and the necessity of the database connection pool is given here. For JSP, a good J2EE server is necessary. JBOOS and WebLogic are both good solutions. In general, when developing database-based WEB programs, the traditional mode basically follows the steps below: 1. Create a database connection in the main program such as Servlet and Beans. 2.

Analysis of Database Connection Pool (2), analysis of Database Connection Pool In the previous blog, I briefly introduced the connection process and resources consumed by common databases, and briefly discussed the connection pool, in this article, we will mainly look at the use of the database

Mondiran creates a connection and mondiran creates a connection.The url used to create a connection using jdbc is in the following format: jdbc: mysql: // hostname: port/database? Key1 = value1 key2 = value2, which must start with "jabc: mysql" in the URL. The address and port of the database server, database name, and other attributes must be declared, take "? "Segmentation, each attribute is separated by