Author: markt
Date: Tue May 26 21:00:29 2015
New Revision: 1681864
URL: http://svn.apache.org/r1681864
Log:
Update startup description. Written with Tomcat 9 in mind but better than the
old one based on Tomcat 5.
Modified:
tomcat/tc8.0.x/trunk/ (props changed)
tomcat/tc8.0.x/trunk/webapps/docs/architecture/startup/serverStartup.txt
Propchange: tomcat/tc8.0.x/trunk/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Tue May 26 21:00:29 2015
@@ -1 +1 @@
-/tomcat/trunk:1636524,1637156,1637176,1637188,1637331,1637684,1637695,1638720-1638725,1639653,1640010,1640083-1640084,1640088,1640275,1640322,1640347,1640361,1640365,1640403,1640410,1640652,1640655-1640658,1640688,1640700-1640883,1640903,1640976,1640978,1641000,1641026,1641038-1641039,1641051-1641052,1641058,1641064,1641300,1641369,1641374,1641380,1641486,1641634,1641656-1641692,1641704,1641707-1641718,1641720-1641722,1641735,1641981,1642233,1642280,1642554,1642564,1642595,1642606,1642668,1642679,1642697,1642699,1642766,1643002,1643045,1643054-1643055,1643066,1643121,1643128,1643206,1643209-1643210,1643216,1643249,1643270,1643283,1643309-1643310,1643323,1643365-1643366,1643370-1643371,1643465,1643474,1643536,1643570,1643634,1643649,1643651,1643654,1643675,1643731,1643733-1643734,1643761,1643766,1643814,1643937,1643963,1644017,1644169,1644201-1644203,1644321,1644323,1644516,1644523,1644529,1644535,1644730,1644768,1644784-1644785,1644790,1644793,1644815,1644884,1644886,1644890,1644892
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+/tomcat/trunk:1636524,1637156,1637176,1637188,1637331,1637684,1637695,1638720-1638725,1639653,1640010,1640083-1640084,1640088,1640275,1640322,1640347,1640361,1640365,1640403,1640410,1640652,1640655-1640658,1640688,1640700-1640883,1640903,1640976,1640978,1641000,1641026,1641038-1641039,1641051-1641052,1641058,1641064,1641300,1641369,1641374,1641380,1641486,1641634,1641656-1641692,1641704,1641707-1641718,1641720-1641722,1641735,1641981,1642233,1642280,1642554,1642564,1642595,1642606,1642668,1642679,1642697,1642699,1642766,1643002,1643045,1643054-1643055,1643066,1643121,1643128,1643206,1643209-1643210,1643216,1643249,1643270,1643283,1643309-1643310,1643323,1643365-1643366,1643370-1643371,1643465,1643474,1643536,1643570,1643634,1643649,1643651,1643654,1643675,1643731,1643733-1643734,1643761,1643766,1643814,1643937,1643963,1644017,1644169,1644201-1644203,1644321,1644323,1644516,1644523,1644529,1644535,1644730,1644768,1644784-1644785,1644790,1644793,1644815,1644884,1644886,1644890,1644892
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Modified:
tomcat/tc8.0.x/trunk/webapps/docs/architecture/startup/serverStartup.txt
URL:
http://svn.apache.org/viewvc/tomcat/tc8.0.x/trunk/webapps/docs/architecture/startup/serverStartup.txt?rev=1681864&r1=1681863&r2=1681864&view=diff
==============================================================================
--- tomcat/tc8.0.x/trunk/webapps/docs/architecture/startup/serverStartup.txt
(original)
+++ tomcat/tc8.0.x/trunk/webapps/docs/architecture/startup/serverStartup.txt
Tue May 26 21:00:29 2015
@@ -13,7 +13,7 @@
See the License for the specific language governing permissions and
limitations under the License.
-Tomcat 5 Startup Sequence
+Tomcat Startup Sequence
Sequence 1. Start from Command Line
Class: org.apache.catalina.startup.Bootstrap
@@ -22,13 +22,15 @@ What it does:
commonLoader (common)-> System Loader
sharedLoader (shared)-> commonLoader -> System Loader
catalinaLoader(server) -> commonLoader -> System Loader
+ (by default the commonLoader is used for the
+ sharedLoader and the serverLoader)
b) Load startup class (reflection)
org.apache.catalina.startup.Catalina
setParentClassloader -> sharedLoader
Thread.contextClassloader -> catalinaLoader
c) Bootstrap.daemon.init() complete
-Sequence 2. Process command line argument (start, startd, stop, stopd)
+Sequence 2. Process command line argument (start, stop)
Class: org.apache.catalina.startup.Bootstrap (assume command->start)
What it does:
a) Catalina.setAwait(true);
@@ -50,7 +52,7 @@ What it does:
The single entry for a set of connectors,
so that a container can listen to multiple connectors
ie, single entry
- org.apache.coyote.tomcat5.CoyoteConnector
+ org.apache.catalina.Connector
Connectors to listen for incoming requests only
It also adds the following rulesets to the digester
NamingRuleSet
@@ -67,13 +69,13 @@ What it does:
During the process call the Connectors also initialize the
adapters.
The adapters are the components that do the request pre-processing.
Typical adapters are HTTP1.1 (default if no protocol is specified,
- org.apache.coyote.http11.Http11Protocol)
+ org.apache.coyote.http11.Http11NioProtocol)
AJP1.3 for mod_jk etc.
c) Catalina.start()
c1) Starts the NamingContext and binds all JNDI references into it
c2) Starts the services under <Server> which are:
- StandardService -> starts Engine (ContainerBase
->Logger,Loader,Realm,Cluster etc)
+ StandardService -> starts Engine (ContainerBase -> Realm,Cluster
etc)
c3) StandardHost (started by the service)
Configures a ErrorReportValvem to do proper HTML output for
different HTTP
errors codes
@@ -85,8 +87,7 @@ What it does:
Starts the HostConfig component
This component deploys all the webapps
(webapps & conf/Catalina/localhost/*.xml)
- Webapps are installed using the deployer
(StandardHostDeployer)
- The deployer will create a Digester for your context, this
digester
+ HostConfig will create a Digester for your context, this
digester
will then invoke ContextConfig.start()
The ContextConfig.start() will process the default
web.xml (conf/web.xml)
and then process the applications web.xml
(WEB-INF/web.xml)
@@ -96,23 +97,23 @@ What it does:
context xml file, web.xml) then a reload is issued
(stop/remove/deploy/start)
d) Tomcat receives a request on an HTTP port
- d1) The request is received by a separate thread which is waiting in
the PoolTcpEndPoint
+ d1) The request is received by a separate thread which is waiting in
the ThreadPoolExecutor
class. It is waiting for a request in a regular
ServerSocket.accept() method.
When a request is received, this thread wakes up.
- d2) The PoolTcpEndPoint assigns the a TcpConnection to handle the
request.
+ d2) The ThreadPoolExecutor assigns the a TaskThread to handle the
request.
It also supplies a JMX object name to the catalina container (not
used I believe)
d3) The processor to handle the request in this case is Coyote
Http11Processor,
and the process method is invoked.
This same processor is also continuing to check the input stream
of the socket
until the keep alive point is reached or the connection is
disconnected.
- d4) The HTTP request is parsed using an internal buffer class (Coyote
Http11 Internal Buffer)
+ d4) The HTTP request is parsed using an internal buffer class
(Http11InputBuffer)
The buffer class parses the request line, the headers, etc and
store the result in a
Coyote request (not an HTTP request) This request contains all the
HTTP info, such
as servername, port, scheme, etc.
d5) The processor contains a reference to an Adapter, in this case it
is the
- Coyote Tomcat 5 Adapter. Once the request has been parsed, the
Http11 processor
+ CoyoteAdapter. Once the request has been parsed, the
Http11Processor
invokes service() on the adapter. In the service method, the
Request contains a
- CoyoteRequest and CoyoteRespons (null for the first time)
+ CoyoteRequest and CoyoteResponse (null for the first time)
The CoyoteRequest(Response) implements HttpRequest(Response) and
HttpServletRequest(Response)
The adapter parses and associates everything with the request,
cookies, the context through a
Mapper, etc
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