inteligr8/jdk-hotswap-docker
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

added multiple paths to hotswap; README

Browse Source
This commit is contained in:
Brian Long
2021-03-16 21:37:51 -04:00
parent 12942fc38e
commit 2a1ce87bfc
2 changed files with 43 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
README.md Normal file
View File

@@ -0,0 +1,27 @@
# Java Application Container Image with Hot-Reloading
This project creates a Docker image that has uses both the [Trava DCEVM](http://dcevm.github.io/) and [Hotswap Agent](http://hotswapagent.org/) and the Java JDWP debugger. The combination of these utilities allows for the hot-reloading of Java resources and classes to enable rapid application development and debugging capabilties. 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 8000 (debugger) port 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/jvm/dev/classes` | Classpath | Yes |
| `/var/lib/jvm/dev/classes-extra1` | Classpath | Yes |
| `/var/lib/jvm/dev/classes-extra2` | Classpath | Yes |
| `/var/lib/jvm/dev/classes-extra3` | Classpath | Yes |
| `/var/lib/jvm/dev/classes-extra4` | Classpath | Yes |
| `/var/lib/jvm/dev/classes-extra5` | Classpath | Yes |
| `/var/lib/jvm/dev/classes-extra6` | Classpath | Yes |
| `/var/lib/jvm/dev/classes-extra7` | Classpath | Yes |
| `/var/lib/jvm/dev/lib` | JARs | No |
| `/var/lib/jvm/dev/lib-extra1` | JARs | No |
| `/var/lib/jvm/dev/lib-extra2` | JARs | No |
| `/var/lib/jvm/dev/lib-extra3` | JARs | No |
| `/var/lib/jvm/dev/lib-extra4` | JARs | No |
| `/var/lib/jvm/dev/lib-extra5` | JARs | No |
| `/var/lib/jvm/dev/lib-extra6` | JARs | No |
| `/var/lib/jvm/dev/lib-extra7` | JARs | No |
You may include your own `hotswap-agent.properties` in any of the `classes` folders. The one loaded by default is usually sufficient.

18
hotswap-agent.properties
View File

@@ -7,7 +7,14 @@
# 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 from built JAR file.
extraClasspath=/var/lib/jvm/dev/classes
extraClasspath=/var/lib/jvm/dev/classes; \
/var/lib/jvm/dev/classes-extra1; \
/var/lib/jvm/dev/classes-extra2; \
/var/lib/jvm/dev/classes-extra3; \
/var/lib/jvm/dev/classes-extra4; \
/var/lib/jvm/dev/classes-extra5; \
/var/lib/jvm/dev/classes-extra6; \
/var/lib/jvm/dev/classes-extra7
# Watch for changes in a directory (resources only). If not set, changes of resources won't be observed.
#
@@ -19,7 +26,14 @@ extraClasspath=/var/lib/jvm/dev/classes
# 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
# in src/main/resources, the new changed resource is served instead.
watchResources=/var/lib/jvm/dev/classes
watchResources=/var/lib/jvm/dev/classes; \
/var/lib/jvm/dev/classes-extra1; \
/var/lib/jvm/dev/classes-extra2; \
/var/lib/jvm/dev/classes-extra3; \
/var/lib/jvm/dev/classes-extra4; \
/var/lib/jvm/dev/classes-extra5; \
/var/lib/jvm/dev/classes-extra6; \
/var/lib/jvm/dev/classes-extra7
# Load static web resources from different directory.
#