Eclipse Guide¶

Use of Maven M2 Plugin¶

The Eclipse built-in support for maven can be used to build and run GeoServer, see Eclipse M2 Quickstart for details.

Use of maven eclipse plugin¶

The maven eclipse plugin is used to generate eclipse projects for a set of modules:

mvn eclipse:eclipse

After which the modules can be imported into an eclipse workspace, see Maven Eclipse Plugin Quickstart for details.

A useful feature of the plugin is the ability to download associated source code for third party dependencies. This is done with the downloadSources flag:

mvn -DdownloadSources eclipse:eclipse

Running GeoServer with Extensions¶

By default, GeoServer will run without any extensions enabled. In order to run GeoServer with extensions, the web-app module declares a number of profiles used to enable specific extensions when running Start. To enable an extension, re-generate the root eclipse profile with the appropriate maven profile(s) enabled:

% mvn eclipse:eclipse -P wps

The full list of supported profiles can be found in src/web/app/pom.xml.

Setting the data directory¶

If unset, GeoServer will default to the minimal directory inside of the web-app module for its data directory. To change this:

1. Open Debug Configurations... from the Eclipse menu

   

2. Select the Start configuration, select the Arguments panel and specify the -DGEOSERVER_DATA_DIR parameter, setting it to the absolute path of the data directory

   

Changing the default port for Jetty¶

If unset, Jetty will default to port 8080. To change this:

1. Open the Arguments panel of the Start configuration as described in the above section

2. Specify the -Djetty.port parameter, setting it to the desired port

   

Configuring JNDI resources in Jetty¶

JNDI resources such as data sources can be configured by supplying a Jetty server configuration file named in the system property jetty.config.file, specified as a line in VM arguments in the Arguments panel of the launch configuration for Start (separate lines are joined when the JVM is launched). The path to the configuration file is relative to the root of the web-app module, in which the launch configuration runs. Naming factory system properties must also be configured for Jetty. For example, VM arguments could include:

-Djetty.config.file=../../../../../settings/jetty.xml
-Djava.naming.factory.url.pkgs=org.eclipse.jetty.jndi
-Djava.naming.factory.initial=org.eclipse.jetty.jndi.InitialContextFactory

The following Jetty server configuration file configures a JNDI data source java:comp/env/jdbc/demo that is a connection pool for an Oracle database:

<?xml version="1.0"?>
<!DOCTYPE Configure PUBLIC "-//Mort Bay Consulting//DTD Configure//EN" "http://jetty.mortbay.org/configure.dtd">
<Configure class="org.eclipse.jetty.server.Server">
    <New class="org.eclipse.jetty.plus.jndi.Resource">
        <Arg>java:comp/env/jdbc/demo</Arg>
        <Arg>
            <New class="org.apache.commons.dbcp.BasicDataSource">
                <Set name="driverClassName">oracle.jdbc.OracleDriver</Set>
                <Set name="url">jdbc:oracle:thin:@oracle.example.com:1521:demodb</Set>
                <Set name="username">claudius</Set>
                <Set name="password">s3cr3t</Set>
                <Set name="maxActive">20</Set>
                <Set name="maxIdle">10</Set>
                <Set name="minIdle">0</Set>
                <Set name="maxWait">10000</Set>
                <Set name="minEvictableIdleTimeMillis">300000</Set>
                <Set name="timeBetweenEvictionRunsMillis">300000</Set>
                <Set name="numTestsPerEvictionRun">20</Set>
                <Set name="poolPreparedStatements">true</Set>
                <Set name="maxOpenPreparedStatements">100</Set>
                <Set name="testOnBorrow">true</Set>
                <Set name="validationQuery">SELECT SYSDATE FROM DUAL</Set>
                <Set name="accessToUnderlyingConnectionAllowed">true</Set>
            </New>
        </Arg>
    </New>
</Configure>

Jetty does not mandate a reference-ref in GeoServer WEB-INF/web.xml, so there is no need to modify that file. No Jetty-specific information is required inside the GeoServer web-app module or data directory, so JNDI resources can be tested under Jetty for later deployment under Tomcat. See also the tutorial Setting up a JNDI connection pool with Tomcat in the GeoServer User Manual.

Starting Jetty with an open SSL port¶

The SSL port used 8443.

1. Open the Arguments panel of the Start configuration.

2. Specify the -Dssl.hostname parameter, setting it to the full qualified host name of the box running Jetty.

   

On first time startup, a key store is created in <home directory>/.geoserver/keystore.jks. The password is changeit and the key store contains a self-signed certificate for the host name passed in the ssl.hostname parameter.

Test the SSL connection by opening a browser and entering https://ux-desktop03.mc-home.local:8443/geoserver. The browser should complain about the self-signed certificate which does not hurt for test and development setups.

Code formatting¶

The Google formatter plugin is embedded in the build and will reformat the code at each build, matching the coding conventions. Please always build before committing!

The google-java-format project offers a plugin for Eclipse, but we are waiting an support for ASOP variant. While we wait for this fix build once on the command line, to format the any code changes before committing.

As workaround you could use a modified version with 4 spaces indent by default, putting the jar file on Eclipse dropins folder.

You may also:

1. Download https://github.com/geotools/geotools/blob/main/build/eclipse/eclipse-java-google-style.xml

2. Navigate to Java, Code Style, Formatter and click Import...

3. Select the eclipse-java-google-style.xml file downloaded in step 1

4. Click Apply

   

5. We follow Google Code Formatting with the AOSP variant (4 spaces indent instead of 2).

   For more information see GeoTools Coding Style page.

Code templates¶

1. Download codetemplates.xml.

2. Navigate to Java, Code Style, Code Templates and click Import...

3. Select the codetemplates.xml file downloaded in step 1

4. Click Apply

Text editors¶

1. Navigate to General, Editors, Text Editors

2. Check Insert spaces for tabs

3. Check Show print margin and set Print margin column to “100”

4. Check Show line numbers

5. Check Show whitespace characters (optional)

   Note

   Showing whitespace characters can help ensure that unnecessary whitespace is not unintentionally committed.

   

6. Click Apply