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You will first need to create a project and enable the Google Cloud api: https://cloud.google.com/docs/authentication#preparation. Take note of the project id that you create in this step as you need to supply it in later steps.
Before running Jetty, you will need to choose one of the following methods to set up the local environment to enable remote GCloud DataStore communications.
Using the GCloud SDK:
gcloud config set project PROJECT_IDgcloud auth login ACCOUNTUsing environment variables
GCLOUD_PROJECT with the project id you created in the preparation step.GOOGLE_APPLICATION_CREDENTIALS=/path/to/my/key.jsonUsing some special, composite indexes can speed up session search operations, although it may make write operations slower.
By default, indexes will not be used.
In order to use them, you will need to manually upload a file that defines the indexes.
This file is named index.yaml and you can find it in your distribution in ${jetty.base}/etc/sessions/gcloud/index.yaml.
Follow the instructions here to upload the pre-generated index.yaml file.
To enable communication using the GCloud Emulator:
When using the Jetty distribution, you will first need to enable the session-store-gcloud module for your Jetty base using the --add-to-start argument on the command line.
$ java -jar ../start.jar --create-startd
INFO : Base directory was modified
$ java -jar ../start.jar --add-to-start=session-store-gcloud
ALERT: There are enabled module(s) with licenses.
The following 2 module(s):
+ contains software not provided by the Eclipse Foundation!
+ contains software not covered by the Eclipse Public License!
+ has not been audited for compliance with its license
Module: gcloud
+ GCloudDatastore is an open source project hosted on Github and released under the Apache 2.0 license.
+ https://github.com/GoogleCloudPlatform/gcloud-java
+ http://www.apache.org/licenses/LICENSE-2.0.html
Module: slf4j-api
+ SLF4J is distributed under the MIT License.
+ Copyright (c) 2004-2013 QOS.ch
+ All rights reserved.
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Proceed (y/N)? y
INFO : webapp transitively enabled, ini template available with --add-to-start=webapp
INFO : jul-impl transitively enabled
INFO : server transitively enabled, ini template available with --add-to-start=server
INFO : sessions transitively enabled, ini template available with --add-to-start=sessions
INFO : servlet transitively enabled
INFO : gcloud transitively enabled, ini template available with --add-to-start=gcloud
INFO : annotations transitively enabled
INFO : plus transitively enabled
INFO : slf4j-api transitively enabled
INFO : security transitively enabled
INFO : gcloud-datastore transitively enabled
INFO : jcl-slf4j transitively enabled
INFO : session-store-gcloud initialized in ${jetty.base}/start.d/session-store-gcloud.ini
INFO : jndi transitively enabled
MKDIR : ${jetty.base}/etc
COPY : ${jetty.home}/modules/jul-impl/etc/java-util-logging.properties to ${jetty.base}/etc/java-util-logging.properties
MKDIR : ${jetty.base}/lib/slf4j
DOWNLD: https://repo1.maven.org/maven2/org/slf4j/slf4j-api/1.7.21/slf4j-api-1.7.21.jar to ${jetty.base}/lib/slf4j/slf4j-api-1.7.21.jar
MKDIR : ${jetty.base}/lib/gcloud
COPY : /Users/admin/.m2/repository/aopalliance/aopalliance/1.0/aopalliance-1.0.jar to ${jetty.base}/lib/gcloud/aopalliance-1.0.jar
COPY : /Users/admin/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.1.3/jackson-core-2.1.3.jar to ${jetty.base}/lib/gcloud/jackson-core-2.1.3.jar
COPY : /Users/admin/.m2/repository/com/google/api-client/google-api-client-appengine/1.21.0/google-api-client-appengine-1.21.0.jar to ${jetty.base}/lib/gcloud/google-api-client-appengine-1.21.0.jar
COPY : /Users/admin/.m2/repository/com/google/api-client/google-api-client/1.20.0/google-api-client-1.20.0.jar to ${jetty.base}/lib/gcloud/google-api-client-1.20.0.jar
COPY : /Users/admin/.m2/repository/com/google/api-client/google-api-client-servlet/1.21.0/google-api-client-servlet-1.21.0.jar to ${jetty.base}/lib/gcloud/google-api-client-servlet-1.21.0.jar
DOWNLD: https://repo1.maven.org/maven2/com/google/api/gax/0.0.21/gax-0.0.21.jar to ${jetty.base}/lib/gcloud/gax-0.0.21.jar
COPY : /Users/admin/.m2/repository/com/google/api/grpc/grpc-google-common-protos/0.1.0/grpc-google-common-protos-0.1.0.jar to ${jetty.base}/lib/gcloud/grpc-google-common-protos-0.1.0.jar
COPY : /Users/admin/.m2/repository/com/google/api/grpc/grpc-google-iam-v1/0.1.0/grpc-google-iam-v1-0.1.0.jar to ${jetty.base}/lib/gcloud/grpc-google-iam-v1-0.1.0.jar
COPY : /Users/admin/.m2/repository/com/google/auth/google-auth-library-credentials/0.3.1/google-auth-library-credentials-0.3.1.jar to ${jetty.base}/lib/gcloud/google-auth-library-credentials-0.3.1.jar
COPY : /Users/admin/.m2/repository/com/google/auth/google-auth-library-oauth2-http/0.3.1/google-auth-library-oauth2-http-0.3.1.jar to ${jetty.base}/lib/gcloud/google-auth-library-oauth2-http-0.3.1.jar
DOWNLD: https://repo1.maven.org/maven2/com/google/auto/value/auto-value/1.2/auto-value-1.2.jar to ${jetty.base}/lib/gcloud/auto-value-1.2.jar
DOWNLD: https://repo1.maven.org/maven2/com/google/cloud/datastore/datastore-v1-proto-client/1.3.0/datastore-v1-proto-client-1.3.0.jar to ${jetty.base}/lib/gcloud/datastore-v1-proto-client-1.3.0.jar
DOWNLD: https://repo1.maven.org/maven2/com/google/cloud/datastore/datastore-v1-protos/1.3.0/datastore-v1-protos-1.3.0.jar to ${jetty.base}/lib/gcloud/datastore-v1-protos-1.3.0.jar
DOWNLD: https://repo1.maven.org/maven2/com/google/cloud/google-cloud-core/0.5.1/google-cloud-core-0.5.1.jar to ${jetty.base}/lib/gcloud/google-cloud-core-0.5.0.jar
DOWNLD: https://repo1.maven.org/maven2/com/google/cloud/google-cloud-datastore/0.5.1/google-cloud-datastore-0.5.1.jar to ${jetty.base}/lib/gcloud/google-cloud-datastore-0.5.1.jar
COPY : /Users/admin/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar to ${jetty.base}/lib/gcloud/jsr305-1.3.9.jar
COPY : /Users/admin/.m2/repository/com/google/code/gson/gson/2.3/gson-2.3.jar to ${jetty.base}/lib/gcloud/gson-2.3.jar
COPY : /Users/admin/.m2/repository/com/google/guava/guava/19.0/guava-19.0.jar to ${jetty.base}/lib/gcloud/guava-19.0.jar
COPY : /Users/admin/.m2/repository/com/google/http-client/google-http-client-appengine/1.21.0/google-http-client-appengine-1.21.0.jar to ${jetty.base}/lib/gcloud/google-http-client-appengine-1.21.0.jar
COPY : /Users/admin/.m2/repository/com/google/http-client/google-http-client-jackson2/1.19.0/google-http-client-jackson2-1.19.0.jar to ${jetty.base}/lib/gcloud/google-http-client-jackson2-1.19.0.jar
COPY : /Users/admin/.m2/repository/com/google/http-client/google-http-client-jackson/1.21.0/google-http-client-jackson-1.21.0.jar to ${jetty.base}/lib/gcloud/google-http-client-jackson-1.21.0.jar
COPY : /Users/admin/.m2/repository/com/google/http-client/google-http-client/1.21.0/google-http-client-1.21.0.jar to ${jetty.base}/lib/gcloud/google-http-client-1.21.0.jar
COPY : /Users/admin/.m2/repository/com/google/http-client/google-http-client-jdo/1.21.0/google-http-client-jdo-1.21.0.jar to ${jetty.base}/lib/gcloud/google-http-client-jdo-1.21.0.jar
COPY : /Users/admin/.m2/repository/com/google/http-client/google-http-client-protobuf/1.20.0/google-http-client-protobuf-1.20.0.jar to ${jetty.base}/lib/gcloud/google-http-client-protobuf-1.20.0.jar
COPY : /Users/admin/.m2/repository/com/google/inject/guice/4.0/guice-4.0.jar to ${jetty.base}/lib/gcloud/guice-4.0.jar
COPY : /Users/admin/.m2/repository/com/google/oauth-client/google-oauth-client-appengine/1.21.0/google-oauth-client-appengine-1.21.0.jar to ${jetty.base}/lib/gcloud/google-oauth-client-appengine-1.21.0.jar
COPY : /Users/admin/.m2/repository/com/google/oauth-client/google-oauth-client/1.21.0/google-oauth-client-1.21.0.jar to ${jetty.base}/lib/gcloud/google-oauth-client-1.21.0.jar
COPY : /Users/admin/.m2/repository/com/google/oauth-client/google-oauth-client-servlet/1.21.0/google-oauth-client-servlet-1.21.0.jar to ${jetty.base}/lib/gcloud/google-oauth-client-servlet-1.21.0.jar
COPY : /Users/admin/.m2/repository/com/google/protobuf/protobuf-java/3.0.0/protobuf-java-3.0.0.jar to ${jetty.base}/lib/gcloud/protobuf-java-3.0.0.jar
COPY : /Users/admin/.m2/repository/com/google/protobuf/protobuf-java-util/3.0.0/protobuf-java-util-3.0.0.jar to ${jetty.base}/lib/gcloud/protobuf-java-util-3.0.0.jar
COPY : /Users/admin/.m2/repository/commons-codec/commons-codec/1.3/commons-codec-1.3.jar to ${jetty.base}/lib/gcloud/commons-codec-1.3.jar
COPY : /Users/admin/.m2/repository/io/grpc/grpc-context/1.0.1/grpc-context-1.0.1.jar to ${jetty.base}/lib/gcloud/grpc-context-1.0.1.jar
COPY : /Users/admin/.m2/repository/io/grpc/grpc-core/1.0.1/grpc-core-1.0.1.jar to ${jetty.base}/lib/gcloud/grpc-core-1.0.1.jar
COPY : /Users/admin/.m2/repository/io/grpc/grpc-protobuf/1.0.1/grpc-protobuf-1.0.1.jar to ${jetty.base}/lib/gcloud/grpc-protobuf-1.0.1.jar
COPY : /Users/admin/.m2/repository/io/grpc/grpc-protobuf-lite/1.0.1/grpc-protobuf-lite-1.0.1.jar to ${jetty.base}/lib/gcloud/grpc-protobuf-lite-1.0.1.jar
COPY : /Users/admin/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar to ${jetty.base}/lib/gcloud/javax.inject-1.jar
COPY : /Users/admin/.m2/repository/javax/jdo/jdo2-api/2.3-eb/jdo2-api-2.3-eb.jar to ${jetty.base}/lib/gcloud/jdo2-api-2.3-eb.jar
COPY : /Users/admin/.m2/repository/javax/transaction/transaction-api/1.1/transaction-api-1.1.jar to ${jetty.base}/lib/gcloud/transaction-api-1.1.jar
COPY : /Users/admin/.m2/repository/joda-time/joda-time/2.9.2/joda-time-2.9.2.jar to ${jetty.base}/lib/gcloud/joda-time-2.9.2.jar
COPY : /Users/admin/.m2/repository/org/apache/httpcomponents/httpclient/4.0.1/httpclient-4.0.1.jar to ${jetty.base}/lib/gcloud/httpclient-4.0.1.jar
COPY : /Users/admin/.m2/repository/org/apache/httpcomponents/httpcore/4.0.1/httpcore-4.0.1.jar to ${jetty.base}/lib/gcloud/httpcore-4.0.1.jar
COPY : /Users/admin/.m2/repository/org/codehaus/jackson/jackson-core-asl/1.9.11/jackson-core-asl-1.9.11.jar to ${jetty.base}/lib/gcloud/jackson-core-asl-1.9.11.jar
COPY : /Users/admin/.m2/repository/org/json/json/20151123/json-20151123.jar to ${jetty.base}/lib/gcloud/json-20151123.jar
DOWNLD: https://repo1.maven.org/maven2/org/slf4j/jcl-over-slf4j/1.7.21/jcl-over-slf4j-1.7.21.jar to ${jetty.base}/lib/slf4j/jcl-over-slf4j-1.7.21.jar
COPY : ${jetty.home}/modules/gcloud/index.yaml to ${jetty.base}/etc/index.yaml
INFO : Base directory was modified
ERROR : Module jcl-slf4j requires a module providing slf4j-impl from one of [slf4j-simple-impl, slf4j-logback, slf4j-jul, slf4j-log4j2, slf4j-log4j]
ERROR : Unsatisfied module dependencies: jcl-slf4j
Usage: java -jar $JETTY_HOME/start.jar [options] [properties] [configs]
java -jar $JETTY_HOME/start.jar --help # for more informationDoing this enables the GCloud Session module and any dependent session modules or files needed for it to run on the server.
The example above is using a fresh ${jetty.base} with nothing else enabled.
Because the Google Cloud DataStore is not a technology provided by the Eclipse Foundation, users are prompted to assent to the licenses of the external vendor (Apache in this case).
You will notice, however, that the above output presented a warning: GCloud requires certain Java Commons Logging features to work correctly.
GCloud has a dependency on Java Commons Logging, and by default Jetty will route this through SLF4J.
Enabling the GCloud Sessions module will also enable the jcl-slf4j module, which sends JCL logging information to SLF4J.
It does not, however, configure a SLF4J implementation for the users.
As such, you will also need to enable one of the SLF4J implementation modules listed.
In this example, we will enable the slf4j-simple-impl module to provide a SLF4J implementation.
$ java -jar ../start.jar --add-to-start=slf4j-simple-impl
INFO : slf4j-simple-impl initialized in ${jetty.base}/start.d/slf4j-simple-impl.ini
INFO : resources transitively enabled
DOWNLD: https://repo1.maven.org/maven2/org/slf4j/slf4j-simple/1.7.21/slf4j-simple-1.7.21.jar to ${jetty.base}/lib/slf4j/slf4j-simple-1.7.21.jar
MKDIR : ${jetty.base}/resources
COPY : ${jetty.home}/modules/slf4j-simple-impl/resources/simplelogger.properties to ${jetty.base}/resources/simplelogger.properties
INFO : Base directory was modifiedWhen the --add-to-start argument was added to the command line the first time, it enabled the the session-store-gcloud module as well as several others, such as as server, sessions, webapp and others which are required for GCloud session management to operate; the slf4j-simple-impl and its dependent modules were added when the the command was run the second time.
In addition to adding these modules to the classpath of the server it also added the respective configuration files to the ${jetty.base}start.d directory.
Note
If you have updated versions of the jar files automatically downloaded by Jetty, you can place them in the associated
${jetty.base}/lib/directory and use the--skip-file-validation=<module name>command line option to prevent errors when starting your server.
Opening the start.d/session-store-gcloud.ini will display a list of all the configurable properties for the Google Cloud DataStore module:
# --------------------------------------- # Module: session-store-gcloud # Enables GCloudDatastore session management. # --------------------------------------- --module=session-store-gcloud ## GCloudDatastore Session config #jetty.session.gracePeriod.seconds=3600 #jetty.session.savePeriod.seconds=0 #jetty.session.gcloud.maxRetries=5 #jetty.session.gcloud.backoffMs=1000 #jetty.session.gcloud.namespace= #jetty.session.gcloud.model.kind=GCloudSession #jetty.session.gcloud.model.id=id #jetty.session.gcloud.model.contextPath=contextPath #jetty.session.gcloud.model.vhost=vhost #jetty.session.gcloud.model.accessed=accessed #jetty.session.gcloud.model.lastAccessed=lastAccessed #jetty.session.gcloud.model.createTime=createTime #jetty.session.gcloud.model.cookieSetTime=cookieSetTime #jetty.session.gcloud.model.lastNode=lastNode #jetty.session.gcloud.model.expiry=expiry #jetty.session.gcloud.model.maxInactive=maxInactive #jetty.session.gcloud.model.attributes=attributes
By default whenever the last concurrent request leaves a session, that session is always persisted via the SessionDataStore, even if the only thing that changed on the session is its updated last access time.
A non-zero value means that the SessionDataStore will skip persisting the session if only the access time changed, and it has been less than savePeriod seconds since the last time the session was written.
Note
Configuring
savePeriodis useful if your persistence technology is very slow/costly for writes. In a clustered environment, there is a risk of the last access time of the session being out-of-date in the shared store for up tosavePeriodseconds. This allows the possibility that a node may prematurely expire the session, even though it is in use by another node. Thorough consideration of themaxIdleTimeof the session when setting thesavePeriodis imperative - there is no point in setting asavePeriodthat is larger than themaxIdleTime.
The other values listed are simply the names of properties that represent stored session data, and can be changed if needed.