forked from cloudfoundry/java-buildpack-memory-calculator
/
main.go
57 lines (46 loc) · 1.59 KB
/
main.go
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// Encoding: utf-8
// Cloud Foundry Java Buildpack
// Copyright (c) 2015 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.
package main
import (
"fmt"
"os"
"strings"
"github.com/cloudfoundry/java-buildpack-memory-calculator/flags"
"github.com/cloudfoundry/java-buildpack-memory-calculator/memory"
"github.com/cloudfoundry/java-buildpack-memory-calculator/memory/switches"
)
const (
exec_name = "java-buildpack-memory-calculator"
)
func main() {
// validateFlags() will exit on error
memSize, weights, sizes := flags.ValidateFlags()
switchFuns := switches.AllJreSwitchFuns
allocator, err := memory.NewAllocator(sizes, weights)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot allocate memory: %s", err)
os.Exit(1)
}
if err = allocator.Balance(memSize); err != nil {
fmt.Fprintf(os.Stderr, "Cannot balance memory: %s", err)
os.Exit(1)
}
if warnings := allocator.GetWarnings(); len(warnings) != 0 {
fmt.Fprintln(os.Stderr, strings.Join(warnings, "\n"))
}
switches := allocator.Switches(switchFuns)
fmt.Fprint(os.Stdout, strings.Join(switches, " "))
}