---
title:  Setting Up the HTTP Module for AppServers
---

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To use the module, you need to modify your application's `web.xml` files. Configuration is slightly different depending on the topology you are setting up.

Refer to [Common Topologies for HTTP Session Management](common_gemfire_topologies.html#common_gemfire_topologies) for more information. Modifying the war file can be done manually or with the `modify_war` script. To see the command line options for the `modify_war` script, invoke:

``` pre
$ modify_war -h
```

## <a id="weblogic_setting_up_the_module__section_9D330F0A9E934B209D77C5A5D79B741C" class="no-quick-link"></a>Manual Configuration

To modify your war or ear file manually, make the following updates:

-   **web.xml** needs a filter added as follows. If you have your own filters, the <%=vars.product_name%> Module filter **must** be the first one.

    ``` pre
    <filter>
        <filter-name>gemfire-session-filter</filter-name>
        <filter-class>
          org.apache.geode.modules.session.filter.SessionCachingFilter
        </filter-class>
        <init-param>
            <param-name>cache-type</param-name>
            <param-value>peer-to-peer</param-value>
        </init-param>
        <init-param>
            <param-name>gemfire.property.locators</param-name>
            <param-value>localhost[10334]</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>gemfire-session-filter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    ```

-   Add the following jar files from the AppServer.zip to the `WEB-INF/lib` directory of the war:
    -   geode-modules jar
    -   geode-modules-session-internal jar
    -   geode-modules-session jar
    -   slf4j-api jar
    -   slf4j-jdk14 jar
-   Add the following jar files from the `$GEODE/lib` directory to the `WEB-INF/lib` directory of the war, where `$GEODE` is set to the <%=vars.product_name%> product installation:
    -   antlr jar
    -   fastutil jar
    -   geode-core jar
    -   geode-json jar
    -   javax.transaction-api jar
    -   jgroups jar
    -   log4j-api jar
    -   log4j-core jar
    -   log4j-jul jar

If you are deploying an ear file:

-   Copy all the dependent files, given above, to the `lib` directory of the ear.
-   Modify each embedded war file's manifest by adding a Class-Path entry which references the shared jars added in the previous step. For example:

    ``` pre
    Manifest-Version: 1.0
    Built-By: joe
    Build-Jdk: 1.8.0_77
    Created-By: Apache Maven
    Archiver-Version: Plexus Archiver
    Class-Path: lib/geode-modules-1.0.0.jar
    lib/geode-modules-session-internal-1.0.0.jar
    lib/geode-modules-session-1.0.0.jar
    lib/slf4j-api-1.7.7.jar
    lib/slf4j-jdk14-1.7.7.jar
    lib/antlr-2.7.7.jar
    lib/fastutil-7.0.2.jar
    lib/geode-core-1.0.0.jar
    lib/geode-json-1.0.0.jar
    lib/javax.transaction-api-1.2.jar
    lib/jgroups-3.6.8.Final.jar
    lib/log4j-api-2.5.jar
    lib/log4j-core-2.5.jar
    lib/log4j-jul-2.5.jar
    ```

## <a id="weblogic_setting_up_the_module__section_20294A39368D4402AEFB3D074E8D5887" class="no-quick-link"></a>Peer-to-Peer Setup

<img src="../../images_svg/http_module_p2p_with_locator.svg" id="weblogic_setting_up_the_module__image_86E949E0F1AD4E9EB67605EFA4E97E13" class="image" />

To run <%=vars.product_name%> in a peer-to-peer configuration, use the `modify_war` script with options
`-t peer-to-peer`,  `-p gemfire.property.locators=localhost[10334]`, and `-p gemfire.propery.cache-xml-file=<moduleDir>/conf/cache-peer.xml`
to result in the following `web.xml` content:

``` pre
<filter>
    <filter-name>gemfire-session-filter</filter-name>
    <filter-class>
        org.apache.geode.modules.session.filter.SessionCachingFilter
    </filter-class>
    <init-param>
        <param-name>cache-type</param-name>
        <param-value>peer-to-peer</param-value>
    </init-param>
    <init-param>
        <param-name>gemfire.property.locators</param-name>
        <param-value>localhost[10334]</param-value>
    </init-param>
</filter>
```

## <a id="weblogic_setting_up_the_module__section_B0CEBE93564540DBA165E0F7A10FDC0B" class="no-quick-link"></a>Client/Server Setup

<img src="../../images_svg/http_module_cs_with_locator.svg" id="weblogic_setting_up_the_module__image_BDF2273487EA4FEB9895D02A6F6FD445" class="image" />

To run <%=vars.product_name%> in a client/server configuration, you make the application server operate as a <%=vars.product_name%> client. Use the `-t client-server` option to the `modify_war` script. This adds the following filter to application server's `web.xml` file:

To run <%=vars.product_name%> in a client/server configuration, you make the application server operate as a <%=vars.product_name%> client. Use the `modify_war` script with options
`-t client-server` and `-p gemfire.property.cache-xml-file=<module dir>/conf/cache-client.xml`
to result in the following `web.xml` content:

``` pre
<filter>
    <filter-name>gemfire-session-filter</filter-name>
    <filter-class>
        org.apache.geode.modules.session.filter.SessionCachingFileter
    </filter-class>
    <init-param>
        <param-name>cache-type</param-name>
        <param-value>client-server</param-value>
    </init-param>
    <init-param>
        <param-name>gemfire.property.cache-xml-file</param-name>
        <param-value>module dir/conf/cache-client.xml</param-value>
    </init-param>
</filter>
```

The `cache-client.xml` file contains a &lt;pool&gt; element pointing at the locator. Its default value is localhost\[10334\].

## <a id="weblogic_setting_up_the_module__section_2B97047AB30A4C549D91AD258657FBA6" class="no-quick-link"></a>Starting the Application Server

After you update the configuration, you are now ready to start your application server instance. Instantiate the locator first:

``` pre
$ gfsh start locator --name=locator1
```

Then start the server:

``` pre
$ gfsh start server \
    --name=server1 \
    --server-port=0 \
    --locators=localhost[10334] \
    --classpath=<moduleDir>/lib/geode-modules-1.0.0.jar:\
<moduleDir>/lib/geode-modules-session-internal-1.0.0.jar
```

Once the application server is started, the <%=vars.product_name%> client will automatically launch within the application server process.

## <a id="weblogic_setting_up_the_module__section_3E186713737E4D5383E23B41CDFED59B" class="no-quick-link"></a>Verifying that <%=vars.product_name%> Started

You can verify that <%=vars.product_name%> has successfully started by inspecting the application server log file. For example:

``` pre
info 2016/04/18 10:04:18.685 PDT <localhost-startStop-2> tid=0x1a]
Initializing <%=vars.product_name%> Modules
Java version:   1.0.0 user1 041816 2016-11-18 08:46:17 -0700
javac 1.8.0_92
Native version: native code unavailable
Source revision: 19dd8eb1907e0beb2aa3e0a17d5f12c6cbec6968
Source repository: develop
Running on: /192.0.2.0, 8 cpu(s), x86_64 Mac OS X 10.11.4
```

Information is also logged within the <%=vars.product_name%> log file, which by default is named `gemfire_modules.<date>.log`.

## <a id="weblogic_setting_up_the_module__section_E0E0E5A1C9484D4AA13878273F16A920" class="no-quick-link"></a>Configuring Non-Sticky Session Replication

Some situations require sessions to be 'non-sticky', which means that client requests can be directed to any server in a cluster of application servers instead of the same server each time. To achieve this, you must configure your deployment as described for the following topologies.

**Peer-to-Peer**

No additional configuration is required.

**Client-Server**

For client-server topologies, the local client cache must be empty. Ensure that the filter property `gemfire.cache.enable_local_cache=false` is set. This effectively sets the local client cache to be a **PROXY** cache.

**Note:**
Non-sticky sessions affect performance because sessions need to be re-created every time a request hits a different server. This may not be noticeable when the session attributes are small, but may become more evident as the session attributes increase in size and/or number.
