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// Copyright 2017 Yahoo Holdings. 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.config.provision.ApplicationId;
import com.yahoo.slime.Cursor;
import com.yahoo.slime.Inspector;
import com.yahoo.slime.Slime;
import com.yahoo.slime.SlimeUtils;
import com.yahoo.text.Utf8;
import java.io.IOException;
/**
* Metadata about an application package.
*
* @author hmusum
*/
public class ApplicationMetaData {
private final String deployedByUser;
private final String deployedFromDir;
private final long deployTimestamp;
private final boolean internalRedeploy;
private final ApplicationId applicationId;
private final String checksum;
private final long generation;
private final long previousActiveGeneration;
public ApplicationMetaData(String deployedByUser, String deployedFromDir, Long deployTimestamp, boolean internalRedeploy,
ApplicationId applicationId, String checksum, Long generation, long previousActiveGeneration) {
this.deployedByUser = deployedByUser;
this.deployedFromDir = deployedFromDir;
this.deployTimestamp = deployTimestamp;
this.internalRedeploy = internalRedeploy;
this.applicationId = applicationId;
this.checksum = checksum;
this.generation = generation;
this.previousActiveGeneration = previousActiveGeneration;
}
/**
* 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; }
public ApplicationId getApplicationId() { return applicationId; }
/**
* 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 whether this application generation was produced by a system internal redeployment,
* not an application package change
*/
public boolean isInternalRedeploy() { return internalRedeploy; }
/** Returns an md5 hash of the contents of the application package */
public String getChecksum() { return checksum; }
/** Returns the previously active generation at the point when this application was created. */
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 = SlimeUtils.jsonToSlime(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(),
booleanField("internalRedeploy", false, deploy),
ApplicationId.fromSerializedForm(app.field("id").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);
deploy.setBool("internalRedeploy", internalRedeploy);
Cursor app = meta.setObject("application");
app.setString("id", applicationId.serializedForm());
app.setString("checksum", checksum);
app.setLong("generation", generation);
app.setLong("previousActiveGeneration", previousActiveGeneration);
return slime;
}
private static boolean booleanField(String fieldName, boolean defaultValue, Inspector object) {
Inspector value = object.field(fieldName);
if ( ! value.valid()) return defaultValue;
return value.asBool();
}
public String asJsonString() {
return Utf8.toString(asJsonBytes());
}
public byte[] asJsonBytes() {
try {
return SlimeUtils.toJsonBytes(getSlime());
} catch (IOException e) {
throw new RuntimeException("Unable to encode metadata", e);
}
}
}
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