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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config.application.api;
import com.yahoo.slime.*;
import com.yahoo.text.Utf8;
import java.io.*;
/**
* Metadata about an application package.
*
* @author hmusum
* @since 5.0
*/
public class ApplicationMetaData {
private final String deployedByUser;
private final String deployedFromDir;
private final long deployTimestamp;
private final long generation;
private final long previousActiveGeneration;
private final String checkSum;
private final String appName;
public ApplicationMetaData(File appDir, String deployedByUser, String deployedFromDir, Long deployTimestamp,
String checkSum, Long generation, long previousActiveGeneration) {
this(deployedByUser, deployedFromDir, deployTimestamp, appDir.getName(), checkSum, generation, previousActiveGeneration);
}
public ApplicationMetaData(String deployedByUser, String deployedFromDir, Long deployTimestamp, String applicationName, String checkSum, Long generation, long previousActiveGeneration) {
this.appName = applicationName;
this.deployedByUser = deployedByUser;
this.deployedFromDir = deployedFromDir;
this.deployTimestamp = deployTimestamp;
this.checkSum = checkSum;
this.generation = generation;
this.previousActiveGeneration = previousActiveGeneration;
}
/**
* Gets the name of the application (name of the directory from which application was deployed.
* Will return null if a problem occurred while getting metadata
*
* @return application name
*/
public String getApplicationName() {
return appName;
}
/**
* Gets the user who deployed the application.
* Will return null if a problem occurred while getting metadata
*
* @return user name for the user who ran "deploy-application"
*/
public String getDeployedByUser() {
return deployedByUser;
}
/**
* Gets the directory where the application was deployed from.
* Will return null if a problem occurred while getting metadata
*
* @return path to raw deploy directory (for the original application)
*/
public String getDeployPath() {
return deployedFromDir;
}
/**
* Gets the time the application was deployed
* Will return null if a problem occurred while getting metadata
*
* @return timestamp for when "deploy-application" was run. In ms.
*/
public Long getDeployTimestamp() {
return deployTimestamp;
}
/**
* Gets the time the application was deployed
* Will return null if a problem occurred while getting metadata
*
* @return timestamp for when "deploy-application" was run. In ms.
*/
public Long getGeneration() {
return generation;
}
/**
* Returns an md5 hash of the contents of the application package
* @return an md5sum of the application package
*/
public String getCheckSum() {
return checkSum;
}
/**
* Returns the previously active generation at the point when this application was created.
* @return a generation.
*/
public long getPreviousActiveGeneration() {
return previousActiveGeneration;
}
@Override
public String toString() {
return deployedByUser + ", " + deployedFromDir + ", " + deployTimestamp + ", " + generation + ", " + checkSum + ", " + previousActiveGeneration;
}
public static ApplicationMetaData fromJsonString(String jsonString) {
try {
Slime data = new Slime();
new JsonDecoder().decode(data, Utf8.toBytes(jsonString));
Inspector root = data.get();
Inspector deploy = root.field("deploy");
Inspector app = root.field("application");
return new ApplicationMetaData(deploy.field("user").asString(), deploy.field("from").asString(), deploy.field("timestamp").asLong(), app.field("name").asString(), app.field("checksum").asString(), app.field("generation").asLong(), app.field("previousActiveGeneration").asLong());
} catch (Exception e) {
throw new IllegalArgumentException("Error parsing json metadata", e);
}
}
public Slime getSlime() {
Slime slime = new Slime();
Cursor meta = slime.setObject();
Cursor deploy = meta.setObject("deploy");
deploy.setString("user", deployedByUser);
deploy.setString("from", deployedFromDir);
deploy.setLong("timestamp", deployTimestamp);
Cursor app = meta.setObject("application");
app.setString("name", appName);
app.setString("checksum", checkSum);
app.setLong("generation", generation);
app.setLong("previousActiveGeneration", previousActiveGeneration);
return slime;
}
public String asJsonString() {
Slime slime = getSlime();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
new JsonFormat(false).encode(baos, slime);
return baos.toString("UTF-8");
} catch (IOException e) {
throw new RuntimeException("Unable to encode metadata", e);
}
}
}
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