ZK Developer's Reference/Development-time Best Practices

There are several settings below we recommend you to specify during development time that can improve your developer experience. They can show you more debugging information and disable various caches to get the latest change without restarting a server.

Separate zk.xml for Development

Put these development-time settings in a separate file, so that you can easily remove it for production in the future.

zk.xml

    <library-property>
        <name>org.zkoss.zk.config.path</name>
        <value>/WEB-INF/zk-dev.xml</value>
    </library-property>

zk-dev.xml

	<system-config>
		<disable-zscript>false</disable-zscript>
	</system-config>
	<!-- show debug information -->
	<client-config>
		<debug-js>true</debug-js>
	</client-config>
	<library-property>
		<name>org.zkoss.zk.ui.versionInfo.enabled</name>
		<value>true</value>
	</library-property>
	<!-- disable various caches -->
	<library-property>
		<name>org.zkoss.zk.ZUML.cache </name>
		<value>false</value>
	</library-property>
	<library-property>
		<name>org.zkoss.zk.WPD.cache</name>
		<value>false</value>
	</library-property>
	<library-property>
		<name>org.zkoss.zk.WCS.cache</name>
		<value>false</value>
	</library-property>
	<library-property>
		<name>org.zkoss.web.classWebResource.cache</name>
		<value>false</value>
	</library-property>
	<library-property>
		<name>org.zkoss.util.label.cache</name>
		<value>false</value>
	</library-property>

Hotswap-supported JDK

Running your application with [TravaOpenJDK11](https://github.com/TravaOpenJDK/trava-jdk-11-dcevm) with JVM option -XX:HotswapAgent. When you modify your java code, re-compile it, the JDK can automatically reload(hot-swap) the new class file that saves the time to restart an application server.

Spring Boot

With Spring Boot, please reference this development config.