com.netflix.atlas.chart.PngGraphEngine.scala Maven / Gradle / Ivy
/*
* Copyright 2014-2024 Netflix, Inc.
*
* 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 com.netflix.atlas.chart
import java.awt.image.RenderedImage
import java.io.OutputStream
import com.netflix.atlas.chart.model.GraphDef
import com.netflix.atlas.chart.util.PngImage
trait PngGraphEngine extends GraphEngine {
val contentType: String = "image/png"
def write(config: GraphDef, output: OutputStream): Unit = {
val metadata = config.source.fold(Map.empty[String, String]) { s =>
val desc = s"start=${config.startTime.toString}, end=${config.endTime.toString}"
Map("Source" -> s, "Description" -> desc)
}
val image = PngImage(createImage(config), metadata)
image.write(output)
}
def createImage(config: GraphDef): RenderedImage
}