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java_opts.rb
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java_opts.rb
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# frozen_string_literal: true
# Cloud Foundry Java Buildpack
# Copyright 2013-2018 the original author or authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
require 'java_buildpack/component'
require 'java_buildpack/util/qualify_path'
module JavaBuildpack
module Component
# An abstraction encapsulating the +JAVA_OPTS+ of an application.
#
# A new instance of this type should be created once for the application.
class JavaOpts < Array
include JavaBuildpack::Util
# Creates an instance of the +JAVA_OPTS+ abstraction.
#
# @param [Pathname] droplet_root the root directory of the droplet
def initialize(droplet_root)
@droplet_root = droplet_root
end
# Adds a +javaagent+ entry to the +JAVA_OPTS+. Prepends +$PWD+ to the path (relative to the droplet root) to
# ensure that the path is always accurate.
#
# @param [Pathname] path the path to the +javaagent+ JAR
# @return [JavaOpts] +self+ for chaining
def add_javaagent(path)
add_preformatted_options "-javaagent:#{qualify_path path}"
end
# Adds a +agentpath+ entry to the +JAVA_OPTS+. Prepends +$PWD+ to the path (relative to the droplet root) to
# ensure that the path is always accurate.
#
# @param [Pathname] path the path to the +agentpath+ shared library
# @param [Properties] props to append to the agentpath entry
# @return [JavaOpts] +self+ for chaining
def add_agentpath_with_props(path, props)
add_preformatted_options "-agentpath:#{qualify_path path}=" + props.map { |k, v| "#{k}=#{v}" }.join(',')
end
# Adds an +agentpath+ entry to the +JAVA_OPTS+. Prepends +$PWD+ to the path (relative to the droplet root) to
# ensure that the path is always accurate.
#
# @param [Pathname] path the path to the +native+ +agent+
# @return [JavaOpts] +self+ for chaining
def add_agentpath(path)
add_preformatted_options "-agentpath:#{qualify_path path}"
end
# Adds a +bootclasspath/p+ entry to the +JAVA_OPTS+. Prepends +$PWD+ to the path (relative to the droplet root) to
# ensure that the path is always accurate.
#
# @param [Pathname] path the path to the +javaagent+ JAR
# @return [JavaOpts] +self+ for chaining
def add_bootclasspath_p(path)
add_preformatted_options "-Xbootclasspath/p:#{qualify_path path}"
end
# Adds a system property to the +JAVA_OPTS+. Ensures that the key is prepended with +-D+. If the value is a
# +Pathname+, then prepends +$PWD+ to the path (relative to the droplet root) to ensure that the path is always
# accurate. Otherwise, uses the value as-is.
#
# @param [String] key the key of the system property
# @param [Pathname, String] value the value of the system property
# @return [JavaOpts] +self+ for chaining
def add_system_property(key, value)
add_preformatted_options "-D#{key}=#{qualify_value(value)}"
end
# Adds an option to the +JAVA_OPTS+. Nothing is prepended to the key. If the value is a +Pathname+, then
# prepends +$PWD+ to the path (relative to the droplet root) to ensure that the path is always accurate.
# Otherwise, uses the value as-is.
#
# @param [String] key the key of the option
# @param [Pathname, String] value the value of the option
# @return [JavaOpts] +self+ for chaining
def add_option(key, value)
add_preformatted_options "#{key}=#{qualify_value(value)}"
end
# Adds a preformatted option to the +JAVA_OPTS+
#
# @param [String] value the value of options
# @return [JavaOpts] +self+ for chaining
def add_preformatted_options(value)
self << value
self
end
# Returns the contents as an environment variable formatted as +JAVA_OPTS="<value1> <value2>"+
#
# @return [String] the contents as an environment variable
def as_env_var
"JAVA_OPTS=\"#{join(' ')}\""
end
private
def qualify_value(value)
value.respond_to?(:relative_path_from) ? qualify_path(value) : value
end
end
end
end