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function.go
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/*
* Copyright 2018-2020 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
*
* https://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.
*/
package java
import (
"strings"
"github.com/buildpacks/libcnb"
"github.com/paketo-buildpacks/libpak"
"github.com/paketo-buildpacks/libpak/bard"
"github.com/projectriff/libfnbuildpack"
)
type Function struct {
ApplicationPath string
Handler string
LayerContributor libpak.LayerContributor
Logger bard.Logger
}
func NewFunction(applicationPath string, handler string) (Function, error) {
return Function{
ApplicationPath: applicationPath,
Handler: handler,
LayerContributor: libpak.NewLayerContributor(
libfnbuildpack.FormatFunction("Java", handler),
map[string]interface{}{"handler": handler},
libcnb.LayerTypes{
Launch: true,
},
),
}, nil
}
func (f Function) Contribute(layer libcnb.Layer) (libcnb.Layer, error) {
f.LayerContributor.Logger = f.Logger
return f.LayerContributor.Contribute(layer, func() (libcnb.Layer, error) {
if len(f.Handler) > 0 {
if strings.ContainsAny(f.Handler, ".") {
layer.LaunchEnvironment.Default("SPRING_CLOUD_FUNCTION_FUNCTION_CLASS", f.Handler)
} else {
layer.LaunchEnvironment.Default("SPRING_CLOUD_FUNCTION_DEFINITION", f.Handler)
}
}
layer.LaunchEnvironment.Default("SPRING_CLOUD_FUNCTION_LOCATION", f.ApplicationPath)
return layer, nil
})
}
func (Function) Name() string {
return "function"
}