Tomcat6.0 directory and server. xml

TomcatThe server is a free open-source Web Application Server. The latest version is 6.x, which improves performance much compared with 5.x. It mainly optimizes memory usage, enhances Io capability, and reconstructs cluster functions.

 

I have recently made an in-depth study of Tomcat 6.x. Refer to the Tomcat full strategy described in the above statement. Since I wrote it for Tomcat 4.x in 2001, I have also summarized it for Tomcat 6.x to form this learning note, I hope it will be helpful to those who want to learn. This article covers Tomcat directory and server. XML Element Description: database connection pool configuration, thread pool configuration, and virtual directory configuration. For details about how to download, install, and run tomcat, please google.

 

 

 

The directory structure of Tomcat is as follows:

 

Directory Name	Introduction
Bin	Store startup and shutdown Tomcat scripts
Conf	Contains different configuration files, server. XML (main configuration file of Tomcat) and Web. xml
Work	Store the class files generated after JSP Compilation
Webapp	Store the application example. The application you want to deploy will also be placed in this directory.
Logs	Store log files
Lib	These three directories mainly store the jar files required by Tomcat

 

 

 

 

Server. xml configuration overview

 

 

Element name	Attribute	Explanation
Server	Port	Specifies a port to listen for requests to disable tomcat.
Shutdown	Specifies the command string sent to the port
Globalnamingresources		The global JNDI resource of the server, which can have sub-tags <resource> </resource>
Executor (thread pool, which can be shared by one or more connectors)	Name	Thread Pool name, which must be unique
Nameprefix	The thread name prefix, used to mark the thread name, so that each thread adds the thread number with this prefix, such as catalina-exec-1, catalina-exec-2
Maxthreads	The maximum number of threads allowed in the thread pool. The default value is 200. High concurrency should be set to a higher value. It is only a limit and does not occupy resources.
Minsparethreads	The minimum number of threads that remain active. The default value is 25. This should be adjusted based on the load. Too small will affect the response speed, too large to occupy resources in vain
Maxidletime	The minimum number of threads that remain active. The default value is 25. This should be adjusted based on the load. Too small will affect the response speed, too large to occupy resources in vain
Threadpriority	The thread level. The default value is thread. norm_priority.
Service	Name	Service name
Connector (indicating the connection between the client and the Service)	Port	Specify the port number to be created on the server and listen to requests from the client at this break.
Minprocessors	Number of threads created when the server is started to process requests
Maxprocessors	Maximum number of threads that can be created to process requests
Enablelookups	If the value is true, you can call request. getremotehost () for DNS query to obtain the actual Host Name of the remote client. If the value is false, no DNS query is performed, but the IP address is returned.
Redirectport	Specifies the port number to be redirected after the server receives an SSL transfer request when processing an HTTP request.
Acceptcount	Specify the number of threads that can be used to process requests, and the number of requests that can be placed in the processing queue. Requests that exceed this number will not be processed.
Connectiontimeout	Time-out period (in milliseconds)
Engine (indicates the request processing machine in the specified service to receive and process requests from ctor)	Name
Defaulthost	Specifies the default host name for processing requests. It must be at least the same as the name attribute value of one of the host elements.
Jvmroute
Host (represents a virtual host and can contain context sub-nodes to configure virtual directories)	Name	Specify the Host Name
Appbase	The basic application directory, that is, the directory where the application is stored.
Unpackwars	If this parameter is set to true, Tomcat automatically decompress the war file. Otherwise, the application is directly run from the war file.
Autodeploy	Automatic deployment
Xmlvalidation	Verify XML
Xmlnamespaceaware
Realm (indicates the database that stores the user name, password, and role)	Classname	Specifies the class name used by realm. This class must implement the org. Apache. Catalina. realm Interface
Context (configure virtual directory for the host subnode)	Path	Virtual directory name
Docbase	Physical path
Debug	Debug mode
Reload	True: Reload. It is automatically loaded after modification.

 

The meanings of server. XML elements are described above. The following is a detailed example.

 

The Tomcat database connection pool is configured as follows:

Server. xml configure Resource

XML Code

1. <Resource Name = "JDBC/exampledb" auth = "Container" type = "javax. SQL. datasource"
2. Maxactive = "100" maxidle = "30" maxwait = "10000"
3. Username = "app" Password = "app" driverclassname = "org. Apache. Derby. JDBC. clientdriver"
4. Url = "JDBC: Derby: // localhost: 1527/springside-example; Create = true"/>

 

Added the context. xml file:

 

XML Code

1. <Watchedresource> WEB-INF/Web. xml </watchedresource>
3. <Resourcelink name = "JDBC/exampledb" Global = "JDBC/exampledb" type = "javax. SQL. datasource"/>

 

Tomcat shared thread pool Configuration:

Cancel the executor comment and modify the number of connections to an appropriate value.

 

XML Code

1. <Executor name = "tomcatthreadpool" nameprefix = "Catalina-Exec -"
2. Maxthreads = "200" minsparethreads = "100" maxidletime = "60000"/>

 

Executor = "tomcatthreadpool" indicates that this connection uses the connection pool named tomcatthreadpool configured above. If the connection pool does not take effect for a non-attribute shared connection, Protocol indicates that the http port number is 8080.

Java code

1. <Connector Port = "8080" protocol = "HTTP/1.1" redirectport = "8443"
2. Connectiontimeout = "20000"
3. Executor = "tomcatthreadpool"
4. Acceptcount = "100"
5. Usebodyencodingforuri = "true"
6. Enablelookups = "false"
7. />

Virtual directory Configuration:

Add the following between

 

<! -- Configure the virtual directory, for example, http: // localhost: 8080 -->

 

XML Code

1. <Context Path = "/" docbase = "D: \ workspace \ code \ hbloud \ Web"> </context>

 

The attachment is taken from springside3 and tomcat production config configuration example, that is, tomcat configuration in the production environment

Tomcat6.0 directory and server. xml