From a5a4427b505a5b0d79bb394093c9d6f6395d9a1f Mon Sep 17 00:00:00 2001 From: Dinh Danh Le Date: Wed, 22 Aug 2018 12:41:50 +0100 Subject: Add docs for tools package & update main apex-pdp Change-Id: I2990157eb7bae51f7d38a652fd8dd488b7287cea Signed-off-by: Dinh Danh Le Issue-ID: POLICY-867 --- .../src/site-docs/adoc/fragments/example-cli.adoc | 125 +++++++++++++++++++++ 1 file changed, 125 insertions(+) create mode 100644 tools/tools-common/src/site-docs/adoc/fragments/example-cli.adoc (limited to 'tools/tools-common/src/site-docs/adoc/fragments/example-cli.adoc') diff --git a/tools/tools-common/src/site-docs/adoc/fragments/example-cli.adoc b/tools/tools-common/src/site-docs/adoc/fragments/example-cli.adoc new file mode 100644 index 000000000..3755502ef --- /dev/null +++ b/tools/tools-common/src/site-docs/adoc/fragments/example-cli.adoc @@ -0,0 +1,125 @@ +// +// ============LICENSE_START======================================================= +// Copyright (C) 2016-2018 Ericsson. All rights reserved. +// ================================================================================ +// This file is licensed under the CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE +// Full license text at https://creativecommons.org/licenses/by/4.0/legalcode +// +// SPDX-License-Identifier: CC-BY-4.0 +// ============LICENSE_END========================================================= +// +// @author Sven van der Meer (sven.van.der.meer@ericsson.com) +// + +== CLI Example + +Using the APEX CLI utilities can be done as follows. +First, add the dependency of the utility project to your POM file. + +[source,xml,subs="attributes+"] +---- + + com.ericsson.apex.apps + apex-apps + {release-version} + +---- + +Now, create a new application project, for instance `MyApp`. +In this project, create a new main application class as `Application.java`. +In this class, create a new main method as `public static void main(String[] args)`. + +No use the provided `CliOptions` and `CliParser`. +Manually importing means to add the following lines to the start of your application (in Eclipse this import will be done automatically): + +[source,java, linenums,subs="attributes+"] +---- +include::{adsite-tools-common-dir}/test/java/org/onap/policy/apex/tools/common/docs/ExampleCliParser.java[tags=import,indent=0] +---- + +Now, inside your `main()` method, start setting some general application properties. +Important are the application name and some description of your application. +For instance: + +[source,java,linenums,subs="attributes+"] +---- +include::{adsite-tools-common-dir}/test/java/org/onap/policy/apex/tools/common/docs/ExampleCliParser.java[tags=setApp,indent=0] +---- + +Next, create a new CLI Parser and add a few CLI options from the standard `CliOptions`. +The following example adds options for help, version, and a model file: + +[source,java,linenums,subs="attributes+"] +---- +include::{adsite-tools-common-dir}/test/java/org/onap/policy/apex/tools/common/docs/ExampleCliParser.java[tags=setCli,indent=0] +---- + +Next, parse the given CLI arguments: + +[source,java,linenums,subs="attributes+"] +---- +include::{adsite-tools-common-dir}/test/java/org/onap/policy/apex/tools/common/docs/ExampleCliParser.java[tags=parseCli,indent=0] +---- + +Once the command line is parsed, we can look into the individual options, check if they are set, and then act accordingly. +We start with the option for __help__. +If the option is present, we print a help screen and return: + +[source,java,linenums,subs="attributes+"] +---- +include::{adsite-tools-common-dir}/test/java/org/onap/policy/apex/tools/common/docs/ExampleCliParser.java[tags=processCliHelp,indent=0] +---- + +Next, we process the option for __version__. +Here, we want to print a version for our application and return. +The CLI Parser already provides a method to obtain the correct version for an APEX build, so we use that: + +[source,java,linenums,subs="attributes+"] +---- +include::{adsite-tools-common-dir}/test/java/org/onap/policy/apex/tools/common/docs/ExampleCliParser.java[tags=processCliVersion,indent=0] +---- + +Once help and version arguments are processed, we can proceed to look at all other options. +We have added an option for a model file, so check this option and test if we can actually load a model file with the given argument. +If we can load a model, everything is ok. +If we cannot load a model, we print an error and return. + +[source,java,linenums,subs="attributes+"] +---- +include::{adsite-tools-common-dir}/test/java/org/onap/policy/apex/tools/common/docs/ExampleCliParser.java[tags=processCliModel,indent=0] +---- + +With a model file being loadable, we finish parsing command line arguments. +We also print some status messages to note that the application now is ready to start: + +[source,java,linenums,subs="attributes+"] +---- +include::{adsite-tools-common-dir}/test/java/org/onap/policy/apex/tools/common/docs/ExampleCliParser.java[tags=someStartPrint,indent=0] +---- + +The last action now is to run the actual application. +The example below is taken from a version of the `Model2Cli` application, which creates a new object and runs it in a `try` block, since exceptions might be thrown by the object: + +[source,java,linenums,subs="attributes+"] +---- +include::{adsite-tools-common-dir}/test/java/org/onap/policy/apex/tools/common/docs/ExampleCliParser.java[tags=yourApp,indent=0] +---- + +If this new application is now called with the command line `-h` or `--help` it will print the following help screen: + +[source,sh,subs="attributes+"] +---- +test-app v{release-version} - a test app for documenting how to use the CLI utilities +usage: test-app + -h,--help prints this help and usage screen + -m,--model set the input policy model file + -v,--version prints the application version +---- + +If this new application is called with the option `-v` or `--version` it will print its version information as: + +[source,sh,subs="attributes+"] +---- +test-app {release-version} +---- + -- cgit 1.2.3-korg