Resources

Lazily-initialized resource loading and Holder-like patterns.

Licensed under the MIT License.

Installation

Using in Gradle:

repositories {
  jcenter()
}

dependencies {
  compile 'net.notjustanna.libs:resources:LATEST' // replace LATEST with the version above
}

Using in Maven:

<repositories>
  <repository>
    <id>central</id>
    <name>bintray</name>
    <url>http://jcenter.bintray.com</url>
  </repository>
</repositories>

<dependencies>
  <dependency>
    <groupId>net.notjustanna.libs</groupId>
    <artifactId>resources</artifactId>
    <version>LATEST</version> <!-- replace LATEST with the version above -->
  </dependency>
</dependencies>

Usage

• You can wrap already-available resources with Resource.of(T).
• You can create lazily-loadable resources with Resource.of(Callable<T>). The lambda will be called on the first invocation.
• You can wrap resources coming from Futures with Resource.ofFuture(Future<T>).
• You can create settable resources, which let you control the state with the Resource with Resource.settable().
• You can also make a unavailable resource with Resource.unavailable().

Expected usage is as follows:

Resource<String> res = Resource.of(() -> "I am".concat(" a computer-expensive").concat(" operation"));

if (res.load()) {
    String computed = res.getValue();
} else {
    System.out.println("Operation errored.");
}

Support