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added more paths to hotswap; added README

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Brian Long
2021-03-16 21:48:12 -04:00
parent fd0394df3c
commit 083658fb13
2 changed files with 59 additions and 3 deletions
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README.md Normal file
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# Apache Tomcat Application Container Image with Hot-Reloading
This project creates a Docker image that has uses the [Java DCEVM Hotswap Docker Image](/inteligr8/java-dcevm-hotswap-docker) to support hot-reloading for the enablement of rapid application development. As a Docker image, containers can be started to facilitate development without requiring complicated installations on developer workstations.
It is expected that containers are configured in Maven using the Fabric8 or Spotify Docker plugins. These configurations should expose the 8080 (HTTP) and 8000 (debugger) ports and any other port that the application may open. Most importantly, it should mount/bind the source code to the following possible paths.
| Directory | Type | Hot-Reloaded |
| ------------------------------------ |:---------:|:------------:|
| `/var/lib/tomcat/dev/classes` | Classpath | Yes |
| `/var/lib/tomcat/dev/classes-extra1` | Classpath | Yes |
| `/var/lib/tomcat/dev/classes-extra2` | Classpath | Yes |
| `/var/lib/tomcat/dev/classes-extra3` | Classpath | Yes |
| `/var/lib/tomcat/dev/classes-extra4` | Classpath | Yes |
| `/var/lib/tomcat/dev/classes-extra5` | Classpath | Yes |
| `/var/lib/tomcat/dev/classes-extra6` | Classpath | Yes |
| `/var/lib/tomcat/dev/classes-extra7` | Classpath | Yes |
| `/var/lib/tomcat/dev/lib` | JARs | No |
| `/var/lib/tomcat/dev/lib-extra1` | JARs | No |
| `/var/lib/tomcat/dev/lib-extra2` | JARs | No |
| `/var/lib/tomcat/dev/lib-extra3` | JARs | No |
| `/var/lib/tomcat/dev/lib-extra4` | JARs | No |
| `/var/lib/tomcat/dev/lib-extra5` | JARs | No |
| `/var/lib/tomcat/dev/lib-extra6` | JARs | No |
| `/var/lib/tomcat/dev/lib-extra7` | JARs | No |
| `/var/lib/tomcat/dev/web` | Web | Yes |
| `/var/lib/tomcat/dev/web-extra1` | Web | Yes |
| `/var/lib/tomcat/dev/web-extra2` | Web | Yes |
| `/var/lib/tomcat/dev/web-extra3` | Web | Yes |
| `/var/lib/tomcat/dev/web-extra4` | Web | Yes |
| `/var/lib/tomcat/dev/web-extra5` | Web | Yes |
| `/var/lib/tomcat/dev/web-extra6` | Web | Yes |
| `/var/lib/tomcat/dev/web-extra7` | Web | Yes |
You may include your own `hotswap-agent.properties` in any of the `classes` folders. The one loaded by default is usually sufficient. It most notably disables the Hotswap Agent Hibernate plugin.

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hotswap-agent.properties
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# This may be useful for example in multi module maven project to load class changes from upstream project # This may be useful for example in multi module maven project to load class changes from upstream project
# classes. Set extraClasspath to upstream project compiler output and .class file will have precedence to # classes. Set extraClasspath to upstream project compiler output and .class file will have precedence to
# classes from built JAR file. # classes from built JAR file.
extraClasspath=/var/lib/tomcat/dev/classes extraClasspath=/var/lib/tomcat/dev/classes; \
/var/lib/tomcat/dev/classes-extra1; \
/var/lib/tomcat/dev/classes-extra2; \
/var/lib/tomcat/dev/classes-extra3; \
/var/lib/tomcat/dev/classes-extra4; \
/var/lib/tomcat/dev/classes-extra5; \
/var/lib/tomcat/dev/classes-extra6; \
/var/lib/tomcat/dev/classes-extra7
# Watch for changes in a directory (resources only). If not set, changes of resources won't be observed. # Watch for changes in a directory (resources only). If not set, changes of resources won't be observed.
# #
@@ -19,14 +26,28 @@ extraClasspath=/var/lib/tomcat/dev/classes
# replacements of resources in a building step (maven filtering resource option). # replacements of resources in a building step (maven filtering resource option).
# This setting will leave i.e. src/target/classes as default source for resources, but after the resource is modified # This setting will leave i.e. src/target/classes as default source for resources, but after the resource is modified
# in src/main/resources, the new changed resource is served instead. # in src/main/resources, the new changed resource is served instead.
watchResources=/var/lib/tomcat/dev/classes watchResources=/var/lib/tomcat/dev/classes; \
/var/lib/tomcat/dev/classes-extra1; \
/var/lib/tomcat/dev/classes-extra2; \
/var/lib/tomcat/dev/classes-extra3; \
/var/lib/tomcat/dev/classes-extra4; \
/var/lib/tomcat/dev/classes-extra5; \
/var/lib/tomcat/dev/classes-extra6; \
/var/lib/tomcat/dev/classes-extra7
# Load static web resources from different directory. # Load static web resources from different directory.
# #
# This setting is dependent on application server plugin(Jetty, Tomcat, ...). # This setting is dependent on application server plugin(Jetty, Tomcat, ...).
# Jboss and Glassfish are not yet supported. # Jboss and Glassfish are not yet supported.
# Use this setting to set to serve resources from source directory directly (e.g. src/main/webapp). # Use this setting to set to serve resources from source directory directly (e.g. src/main/webapp).
webappDir=/var/lib/tomcat/dev/web webappDir=/var/lib/tomcat/dev/web; \
/var/lib/tomcat/dev/web-extra1; \
/var/lib/tomcat/dev/web-extra2; \
/var/lib/tomcat/dev/web-extra3; \
/var/lib/tomcat/dev/web-extra4; \
/var/lib/tomcat/dev/web-extra5; \
/var/lib/tomcat/dev/web-extra6; \
/var/lib/tomcat/dev/web-extra7
# Comma separated list of disabled plugins # Comma separated list of disabled plugins