Struts中调用orcal存储过程的游标时报错为:Define tag cannot set a null value

adam_li 2006-04-24 11:27:06
我在Struts中用jdbc可以调出游标结果集,但用链接池时就报错为:Define tag cannot set a null value
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adam_li 2006-04-24
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wsk_228 2006-04-24
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adam_li 2006-04-24
HashMap map = (HashMap)session.getAttribute("map");
replicationMode = can be either 'synchronous' or 'asynchronous'.
* Synchronous means that the thread that executes the request, is also the
thread the replicates the data to the other nodes, and will not return until all
nodes have received the information.
* Asynchronous means that there is a specific 'sender' thread for each cluster node,
so the request thread will queue the replication request into a "smart" queue,
and then return to the client.
The "smart" queue is a queue where when a session is added to the queue, and the same session
already exists in the queue from a previous request, that session will be replaced
in the queue instead of replicating two requests. This almost never happens, unless there is a
large network delay.

<!-- When uncommenting the cluster, REMEMBER to uncomment the replication Valve below as well

<Cluster className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
When configuring for clustering, you also add in a valve to catch all the requests
coming in, at the end of the request, the session may or may not be replicated.
A session is replicated if and only if all the conditions are met:
1. useDirtyFlag is true or setAttribute or removeAttribute has been called AND
2. a session exists (has been created)
3. the request is not trapped by the "filter" attribute

The filter attribute is to filter out requests that could not modify the session,
hence we don't replicate the session after the end of this request.
The filter is negative, ie, anything you put in the filter, you mean to filter out,
ie, no replication will be done on requests that match one of the filters.
The filter attribute is delimited by ;, so you can't escape out ; even if you wanted to.

filter=".*\.gif;.*\.js;" means that we will not replicate the session after requests with the URI
ending with .gif and .js are intercepted.
<Valve className="org.apache.catalina.cluster.tcp.ReplicationValve"

<!-- Normally, users must authenticate themselves to each web app
individually. Uncomment the following entry if you would like
a user to be authenticated the first time they encounter a
resource protected by a security constraint, and then have that
user identity maintained across *all* web applications contained
in this virtual host. -->
<Valve className="org.apache.catalina.authenticator.SingleSignOn"

<!-- Access log processes all requests for this virtual host. By
default, log files are created in the "logs" directory relative to
$CATALINA_HOME. If you wish, you can specify a different
directory with the "directory" attribute. Specify either a relative
(to $CATALINA_HOME) or absolute path to the desired directory.
<Valve className="org.apache.catalina.valves.AccessLogValve"
directory="logs" prefix="localhost_access_log." suffix=".txt"
pattern="common" resolveHosts="false"/>

<!-- Logger shared by all Contexts related to this virtual host. By
default (when using FileLogger), log files are created in the "logs"
directory relative to $CATALINA_HOME. If you wish, you can specify
a different directory with the "directory" attribute. Specify either a
relative (to $CATALINA_HOME) or absolute path to the desired
<Logger className="org.apache.catalina.logger.FileLogger"
directory="logs" prefix="localhost_log." suffix=".txt"

<!-- Define properties for each web application. This is only needed
if you want to set non-default properties, or have web application
document roots in places other than the virtual host's appBase
directory. -->

<!-- Tomcat Root Context -->
<Context path="" docBase="ROOT" debug="0">

<Context path="/advertisement" docBase="/advertisement" debug="0">
<Resource name="jdbc/adv" auth="Container" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/adv">




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adam_li 2006-04-24

<!-- Define a SSL Coyote HTTP/1.1 Connector on port 8443 -->
<Connector port="8443"
maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
enableLookups="false" disableUploadTimeout="true"
acceptCount="100" debug="0" scheme="https" secure="true">
<Factory clientAuth="false" protocol="TLS" />

<!-- Define a Coyote/JK2 AJP 1.3 Connector on port 8009 -->
<Connector port="8009"
enableLookups="false" redirectPort="8443" debug="0"
protocol="AJP/1.3" />

<!-- Define a Proxied HTTP/1.1 Connector on port 8082 -->
<!-- See proxy documentation for more information about using this. -->
<Connector port="8082"
maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
acceptCount="100" debug="0" connectionTimeout="20000"
proxyPort="80" disableUploadTimeout="true" />

<!-- An Engine represents the entry point (within Catalina) that processes
every request. The Engine implementation for Tomcat stand alone
analyzes the HTTP headers included with the request, and passes them
on to the appropriate Host (virtual host). -->

<!-- You should set jvmRoute to support load-balancing via JK/JK2 ie :
<Engine name="Standalone" defaultHost="localhost" debug="0" jvmRoute="jvm1">

<!-- Define the top level container in our container hierarchy -->
<Engine name="Catalina" defaultHost="localhost" debug="0">

<!-- The request dumper valve dumps useful debugging information about
the request headers and cookies that were received, and the response
headers and cookies that were sent, for all requests received by
this instance of Tomcat. If you care only about requests to a
particular virtual host, or a particular application, nest this
element inside the corresponding <Host> or <Context> entry instead.

For a similar mechanism that is portable to all Servlet 2.4
containers, check out the "RequestDumperFilter" Filter in the
example application (the source for this filter may be found in

Request dumping is disabled by default. Uncomment the following
element to enable it. -->
<Valve className="org.apache.catalina.valves.RequestDumperValve"/>

<!-- Global logger unless overridden at lower levels -->
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="catalina_log." suffix=".txt"

<!-- Because this Realm is here, an instance will be shared globally -->

<!-- This Realm uses the UserDatabase configured in the global JNDI
resources under the key "UserDatabase". Any edits
that are performed against this UserDatabase are immediately
available for use by the Realm. -->
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
debug="0" resourceName="UserDatabase"/>

<!-- Comment out the old realm but leave here for now in case we
need to go back quickly -->
<Realm className="org.apache.catalina.realm.MemoryRealm" />

<!-- Replace the above Realm with one of the following to get a Realm
stored in a database and accessed via JDBC -->

<Realm className="org.apache.catalina.realm.JDBCRealm" debug="99"
connectionName="test" connectionPassword="test"
userTable="users" userNameCol="user_name" userCredCol="user_pass"
userRoleTable="user_roles" roleNameCol="role_name" />

<Realm className="org.apache.catalina.realm.JDBCRealm" debug="99"
connectionName="scott" connectionPassword="tiger"
userTable="users" userNameCol="user_name" userCredCol="user_pass"
userRoleTable="user_roles" roleNameCol="role_name" />

<Realm className="org.apache.catalina.realm.JDBCRealm" debug="99"
userTable="users" userNameCol="user_name" userCredCol="user_pass"
userRoleTable="user_roles" roleNameCol="role_name" />

<!-- Define the default virtual host -->
<Host name="localhost" debug="0" appBase="webapps"
unpackWARs="true" autoDeploy="true">

<!-- Add the following attributes if you want to turn XML validation
on. Remember to comment the Host element above.

Note: XML Schema validationn will works with Xerces 2.0.1 or
Xerces 2.1. Xerces 2.0.2 and Xerces 2.2 have bugs that prevent
their use with Tomcat-->
<Host name="localhost" debug="0" appBase="webapps"
unpackWARs="true" autoDeploy="true"
xmlValidation="true" xmlNamespaceAware="true">

<!-- Defines a cluster for this node,
By defining this element, means that every manager will be changed.
So when running a cluster, only make sure that you have webapps in there
that need to be clustered and remove the other ones.
A cluster has the following parameters:

className = the fully qualified name of the cluster class

name = a descriptive name for your cluster, can be anything

debug = the debug level, higher means more output

mcastAddr = the multicast address, has to be the same for all the nodes

mcastPort = the multicast port, has to be the same for all the nodes

mcastFrequency = the number of milliseconds in between sending a "I'm alive" heartbeat

mcastDropTime = the number a milliseconds before a node is considered "dead" if no heartbeat is received

tcpThreadCount = the number of threads to handle incoming replication requests, optimal would be the same amount of threads as nodes

tcpListenAddress = the listen address (bind address) for TCP cluster request on this host,
in case of multiple ethernet cards.
auto means that address becomes

tcpListenPort = the tcp listen port

tcpSelectorTimeout = the timeout (ms) for the method in case the OS
has a wakup bug in java.nio. Set to 0 for no timeout

printToScreen = true means that managers will also print to std.out

expireSessionsOnShutdown = true means that

useDirtyFlag = true means that we only replicate a session after setAttribute,removeAttribute has been called.
false means to replicate the session after each request.
false means that replication would work for the following piece of code:
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adam_li 2006-04-24
<!-- Example Server Configuration File -->
<!-- Note that component elements are nested corresponding to their
parent-child relationships with each other -->

<!-- A "Server" is a singleton element that represents the entire JVM,
which may contain one or more "Service" instances. The Server
listens for a shutdown command on the indicated port.

Note: A "Server" is not itself a "Container", so you may not
define subcomponents such as "Valves" or "Loggers" at this level.

<Server port="8005" shutdown="SHUTDOWN" debug="0">

<!-- Comment out these entries to disable JMX MBeans support -->
<Listener className="org.apache.catalina.mbeans.ServerLifecycleListener"
<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"

<!-- Global JNDI resources -->

<!-- Test entry for demonstration purposes -->
<Environment name="simpleValue" type="java.lang.Integer" value="30"/>

<!-- Editable user database that can also be used by
UserDatabaseRealm to authenticate users -->
<Resource name="UserDatabase" auth="Container"
description="User database that can be updated and saved">
<ResourceParams name="UserDatabase">


<!-- A "Service" is a collection of one or more "Connectors" that share
a single "Container" (and therefore the web applications visible
within that Container). Normally, that Container is an "Engine",
but this is not required.

Note: A "Service" is not itself a "Container", so you may not
define subcomponents such as "Valves" or "Loggers" at this level.

<!-- Define the Tomcat Stand-Alone Service -->
<Service name="Catalina">

<!-- A "Connector" represents an endpoint by which requests are received
and responses are returned. Each Connector passes requests on to the
associated "Container" (normally an Engine) for processing.

By default, a non-SSL HTTP/1.1 Connector is established on port 8080.
You can also enable an SSL HTTP/1.1 Connector on port 8443 by
following the instructions below and uncommenting the second Connector
entry. SSL support requires the following steps (see the SSL Config
HOWTO in the Tomcat 5 documentation bundle for more detailed
* Download and install JSSE 1.0.2 or later, and put the JAR files
into "$JAVA_HOME/jre/lib/ext".
* Execute:
%JAVA_HOME%\bin\keytool -genkey -alias tomcat -keyalg RSA (Windows)
$JAVA_HOME/bin/keytool -genkey -alias tomcat -keyalg RSA (Unix)
with a password value of "changeit" for both the certificate and
the keystore itself.

By default, DNS lookups are enabled when a web application calls
request.getRemoteHost(). This can have an adverse impact on
performance, so you can disable it by setting the
"enableLookups" attribute to "false". When DNS lookups are disabled,
request.getRemoteHost() will return a String containing the
IP address of the remote client.

<!-- Define a non-SSL Coyote HTTP/1.1 Connector on the port specified
during installation -->
port="80" maxThreads="1500" minSpareThreads="500" maxSpareThreads="750"
enableLookups="false" redirectPort="8443" acceptCount="100"
debug="0" connectionTimeout="30000"
disableUploadTimeout="true" />
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wsk_228 2006-04-24

Define tag cannot set a null value
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adam_li 2006-04-24
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2006-04-24 11:27