com.google.appengine.api.utils
Class SystemProperty

java.lang.Object
  com.google.appengine.api.utils.SystemProperty

Direct Known Subclasses:

SystemProperty.Environment

public class SystemProperty
extends java.lang.Object

Global system properties which are set by App Engine.

Example code:

 if (SystemProperty.environment.value() == SystemProperty.Environment.Value.Production) {
   // do something that's production-only
 }
 String version = SystemProperty.version.get();
 

Nested Class Summary

static class

SystemProperty.Environment The current executing environment.

Field Summary

static SystemProperty	applicationId The application identifier for the current application.
static SystemProperty	applicationVersion The major version number for the currently running version of the application plus a timestamp at which it was deployed.
static SystemProperty.Environment	environment The current executing environment.
static SystemProperty	instanceReplicaId Deprecated. Use com.google.appengine.api.servers.ServerService#getCurrentInstance()
static SystemProperty	version The current executing runtime version.

Method Summary

java.lang.String	get() Gets the value of the system property.
java.lang.String	key() The key for the system property.
void	set(java.lang.String value) Sets the value of the system property.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

environment

public static final SystemProperty.Environment environment

The current executing environment. Has the key, "com.google.appengine.runtime.environment". Has the values "Production" and "Development".

version

public static final SystemProperty version

The current executing runtime version. Has the key, "com.google.appengine.runtime.version". A Version value is composed of period-separated integers, for example, "1.2.8".

applicationId

public static final SystemProperty applicationId

The application identifier for the current application. Has the key, "com.google.appengine.application.id".

applicationVersion

public static final SystemProperty applicationVersion

The major version number for the currently running version of the application plus a timestamp at which it was deployed. Has the key, "com.google.appengine.application.version".

instanceReplicaId

@Deprecated
public static final SystemProperty instanceReplicaId

Deprecated. Use com.google.appengine.api.servers.ServerService#getCurrentInstance()

Method Detail

key

public java.lang.String key()

The key for the system property.

get

public java.lang.String get()

Gets the value of the system property. Equivalent to System.getProperty(key()).

set

public void set(java.lang.String value)

Sets the value of the system property. Equivalent to System.setProperty(key(), value).