Webflow Session

CAS uses Spring Webflow to manage the authentication sequence. Spring Webflow provides a pluggable architecture whereby various actions, decisions and operations throughout the primary authentication workflow can be easily controlled and navigated. In order for this navigation to work, some form of conversational session state must be maintained.

 Provides information about the application’s HTTP sessions that are managed by Spring Session.

 Provides information about the application’s HTTP sessions that are managed by Spring Session.

 Provides information about the application’s HTTP sessions that are managed by Spring Session.


Client-side Sessions

CAS provides a facility for storing flow execution state on the client in Spring Webflow. Flow state is stored as an encoded byte stream in the flow execution identifier provided to the client when rendering a view. By default, CAS automatically attempts to store and keep track of this state on the client in an encrypted form via encryption and signing keys to remove the need for session cleanup, termination and replication.

The following settings and properties are available from the CAS configuration catalog:

The configuration settings listed below are tagged as Required in the CAS configuration metadata. This flag indicates that the presence of the setting may be needed to activate or affect the behavior of the CAS feature and generally should be reviewed, possibly owned and adjusted. If the setting is assigned a default value, you do not need to strictly put the setting in your copy of the configuration, but should review it nonetheless to make sure it matches your deployment expectations.

  • cas.webflow.crypto.encryption.key=
  • The encryption key. The encryption key by default and unless specified otherwise must be randomly-generated string whose length is defined by the encryption key size setting.

    org.apereo.cas.configuration.model.core.util.EncryptionRandomizedCryptoProperties.

    How can I configure this property?

  • cas.webflow.crypto.signing.key=
  • The signing key is a JWT whose length is defined by the signing key size setting.

    This setting supports the Spring Expression Language.

    org.apereo.cas.configuration.model.core.util.SigningJwtCryptoProperties.

    How can I configure this property?

  • cas.webflow.session.storage=false
  • Controls whether spring webflow sessions are to be stored server-side or client side. By default state is managed on the client side, that is also signed and encrypted.

    org.apereo.cas.configuration.model.core.web.flow.WebflowSessionManagementProperties.

    How can I configure this property?

    The configuration settings listed below are tagged as Optional in the CAS configuration metadata. This flag indicates that the presence of the setting is not immediately necessary in the end-user CAS configuration, because a default value is assigned or the activation of the feature is not conditionally controlled by the setting value. In other words, you should only include this field in your configuration if you need to modify the default value or if you need to turn on the feature controlled by the setting.

  • cas.webflow.crypto.alg=AES
  • The signing/encryption algorithm to use.

    org.apereo.cas.configuration.model.core.util.EncryptionRandomizedSigningJwtCryptographyProperties.

    How can I configure this property?

  • cas.webflow.crypto.enabled=true
  • Whether crypto operations are enabled.

    org.apereo.cas.configuration.model.core.util.EncryptionRandomizedSigningJwtCryptographyProperties.

    How can I configure this property?

  • cas.webflow.crypto.encryption.key-size=16
  • Encryption key size.

    org.apereo.cas.configuration.model.core.util.EncryptionRandomizedCryptoProperties.

    How can I configure this property?

  • cas.webflow.crypto.signing-enabled=true
  • Whether signing encryption operations are enabled.

    org.apereo.cas.configuration.model.core.util.EncryptionRandomizedSigningJwtCryptographyProperties.

    How can I configure this property?

  • cas.webflow.crypto.signing.key-size=512
  • The signing key size.

    org.apereo.cas.configuration.model.core.util.SigningJwtCryptoProperties.

    How can I configure this property?

  • cas.webflow.crypto.encryption.key=
  • The encryption key. The encryption key by default and unless specified otherwise must be randomly-generated string whose length is defined by the encryption key size setting.

    org.apereo.cas.configuration.model.core.util.EncryptionRandomizedCryptoProperties.

    How can I configure this property?

  • cas.webflow.crypto.signing.key=
  • The signing key is a JWT whose length is defined by the signing key size setting.

    This setting supports the Spring Expression Language.

    org.apereo.cas.configuration.model.core.util.SigningJwtCryptoProperties.

    How can I configure this property?

  • cas.webflow.crypto.alg=AES
  • The signing/encryption algorithm to use.

    org.apereo.cas.configuration.model.core.util.EncryptionRandomizedSigningJwtCryptographyProperties.

    How can I configure this property?

  • cas.webflow.crypto.enabled=true
  • Whether crypto operations are enabled.

    org.apereo.cas.configuration.model.core.util.EncryptionRandomizedSigningJwtCryptographyProperties.

    How can I configure this property?

  • cas.webflow.crypto.encryption.key-size=16
  • Encryption key size.

    org.apereo.cas.configuration.model.core.util.EncryptionRandomizedCryptoProperties.

    How can I configure this property?

  • cas.webflow.crypto.signing-enabled=true
  • Whether signing encryption operations are enabled.

    org.apereo.cas.configuration.model.core.util.EncryptionRandomizedSigningJwtCryptographyProperties.

    How can I configure this property?

  • cas.webflow.crypto.signing.key-size=512
  • The signing key size.

    org.apereo.cas.configuration.model.core.util.SigningJwtCryptoProperties.

    How can I configure this property?

    This CAS feature is able to accept signing and encryption crypto keys. In most scenarios if keys are not provided, CAS will auto-generate them. The following instructions apply if you wish to manually and beforehand create the signing and encryption keys.

    Note that if you are asked to create a JWK of a certain size for the key, you are to use the following set of commands to generate the token:

    1
    2
    
    wget https://raw.githubusercontent.com/apereo/cas/master/etc/jwk-gen.jar
    java -jar jwk-gen.jar -t oct -s [size]
    

    The outcome would be similar to:

    1
    2
    3
    4
    5
    
    {
      "kty": "oct",
      "kid": "...",
      "k": "..."
    }
    

    The generated value for k needs to be assigned to the relevant CAS settings. Note that keys generated via the above algorithm are processed by CAS using the Advanced Encryption Standard (AES) algorithm which is a specification for the encryption of electronic data established by the U.S. National Institute of Standards and Technology.


    Configuration Metadata

    The collection of configuration properties listed in this section are automatically generated from the CAS source and components that contain the actual field definitions, types, descriptions, modules, etc. This metadata may not always be 100% accurate, or could be lacking details and sufficient explanations.

    Be Selective

    This section is meant as a guide only. Do NOT copy/paste the entire collection of settings into your CAS configuration; rather pick only the properties that you need. Do NOT enable settings unless you are certain of their purpose and do NOT copy settings into your configuration only to keep them as reference. All these ideas lead to upgrade headaches, maintenance nightmares and premature aging.

    YAGNI

    Note that for nearly ALL use cases, declaring and configuring properties listed here is sufficient. You should NOT have to explicitly massage a CAS XML/Java/etc configuration file to design an authentication handler, create attribute release policies, etc. CAS at runtime will auto-configure all required changes for you. If you are unsure about the meaning of a given CAS setting, do NOT turn it on without hesitation. Review the codebase or better yet, ask questions to clarify the intended behavior.

    Naming Convention

    Property names can be specified in very relaxed terms. For instance cas.someProperty, cas.some-property, cas.some_property are all valid names. While all forms are accepted by CAS, there are certain components (in CAS and other frameworks used) whose activation at runtime is conditional on a property value, where this property is required to have been specified in CAS configuration using kebab case. This is both true for properties that are owned by CAS as well as those that might be presented to the system via an external library or framework such as Spring Boot, etc.

    :information_source: Note

    When possible, properties should be stored in lower-case kebab format, such as cas.property-name=value. The only possible exception to this rule is when naming actuator endpoints; The name of the actuator endpoints (i.e. ssoSessions) MUST remain in camelCase mode.

    Settings and properties that are controlled by the CAS platform directly always begin with the prefix cas. All other settings are controlled and provided to CAS via other underlying frameworks and may have their own schemas and syntax. BE CAREFUL with the distinction. Unrecognized properties are rejected by CAS and/or frameworks upon which CAS depends. This means if you somehow misspell a property definition or fail to adhere to the dot-notation syntax and such, your setting is entirely refused by CAS and likely the feature it controls will never be activated in the way you intend.

    Validation

    Configuration properties are automatically validated on CAS startup to report issues with configuration binding, specially if defined CAS settings cannot be recognized or validated by the configuration schema. Additional validation processes are also handled via Configuration Metadata and property migrations applied automatically on startup by Spring Boot and family.

    Indexed Settings

    CAS settings able to accept multiple values are typically documented with an index, such as cas.some.setting[0]=value. The index [0] is meant to be incremented by the adopter to allow for distinct multiple configuration blocks.

    In the event that keys are not generated by the deployer, CAS will attempt to auto-generate keys and will output the result for each respected key. The deployer MUST attempt to copy the generated keys to their CAS properties file, specially when running a multi-node CAS deployment. Failure to do so will prevent CAS to appropriate decrypt and encrypt the webflow state and will prevent successful single sign-on.

    :warning: Usage Warning!

    While the above settings are all optional, it is recommended that you provide your own configuration and settings for encrypting and transcoding of the web session state.

    Server-side Sessions

    In the event that you wish to use server-side session storage for managing the webflow session, you will need to enable this behavior via CAS properties.

    The following settings and properties are available from the CAS configuration catalog:

    The configuration settings listed below are tagged as Required in the CAS configuration metadata. This flag indicates that the presence of the setting may be needed to activate or affect the behavior of the CAS feature and generally should be reviewed, possibly owned and adjusted. If the setting is assigned a default value, you do not need to strictly put the setting in your copy of the configuration, but should review it nonetheless to make sure it matches your deployment expectations.

  • cas.webflow.session.storage=false
  • Controls whether spring webflow sessions are to be stored server-side or client side. By default state is managed on the client side, that is also signed and encrypted.

    org.apereo.cas.configuration.model.core.web.flow.WebflowSessionManagementProperties.

    How can I configure this property?

    The configuration settings listed below are tagged as Optional in the CAS configuration metadata. This flag indicates that the presence of the setting is not immediately necessary in the end-user CAS configuration, because a default value is assigned or the activation of the feature is not conditionally controlled by the setting value. In other words, you should only include this field in your configuration if you need to modify the default value or if you need to turn on the feature controlled by the setting.

  • cas.webflow.session.server.compress=false
  • Whether or not the snapshots should be compressed. Only relevant if session storage is done on the server.

    org.apereo.cas.configuration.model.core.web.flow.WebflowServerSessionsProperties.

    How can I configure this property?

  • cas.webflow.session.server.lock-timeout=PT30S
  • Sets the time period that can elapse before a timeout occurs on an attempt to acquire a conversation lock. The default is 30 seconds. Only relevant if session storage is done on the server.

    This settings supports the java.time.Duration syntax [?].

    org.apereo.cas.configuration.model.core.web.flow.WebflowServerSessionsProperties.

    How can I configure this property?

  • cas.webflow.session.server.max-conversations=5
  • Using the maxConversations property, you can limit the number of concurrently active conversations allowed in a single session. If the maximum is exceeded, the conversation manager will automatically end the oldest conversation. The default is 5, which should be fine for most situations. Set it to -1 for no limit. Setting maxConversations to 1 allows easy resource cleanup in situations where there should only be one active conversation per session. Only relevant if session storage is done on the server.

    org.apereo.cas.configuration.model.core.web.flow.WebflowServerSessionsProperties.

    How can I configure this property?

    The configuration settings listed below are tagged as Third Party in the CAS configuration metadata. This flag indicates that the configuration setting is not controlled, owned or managed by the CAS ecosystem, and affects functionality that is offered by a third-party library, such as Spring Boot or Spring Cloud to CAS. For additional info, you might have to visit the third-party source to find more details.

  • spring.session.hazelcast.flush-mode=on-save
  • Sessions flush mode. Determines when session changes are written to the session store.

    org.springframework.boot.autoconfigure.session.HazelcastSessionProperties.

    How can I configure this property?

  • spring.session.hazelcast.map-name=spring:session:sessions
  • Name of the map used to store sessions.

    org.springframework.boot.autoconfigure.session.HazelcastSessionProperties.

    How can I configure this property?

  • spring.session.hazelcast.save-mode=on-set-attribute
  • Sessions save mode. Determines how session changes are tracked and saved to the session store.

    org.springframework.boot.autoconfigure.session.HazelcastSessionProperties.

    How can I configure this property?

  • spring.session.jdbc.cleanup-cron=0 * * * * *
  • Cron expression for expired session cleanup job.

    org.springframework.boot.autoconfigure.session.JdbcSessionProperties.

    How can I configure this property?

  • spring.session.jdbc.flush-mode=on-save
  • Sessions flush mode. Determines when session changes are written to the session store.

    org.springframework.boot.autoconfigure.session.JdbcSessionProperties.

    How can I configure this property?

  • spring.session.jdbc.initialize-schema=embedded
  • Database schema initialization mode.

    org.springframework.boot.autoconfigure.session.JdbcSessionProperties.

    How can I configure this property?

  • spring.session.jdbc.platform=
  • Platform to use in initialization scripts if the @@platform@@ placeholder is used. Auto-detected by default.

    org.springframework.boot.autoconfigure.session.JdbcSessionProperties.

    How can I configure this property?

  • spring.session.jdbc.save-mode=on-set-attribute
  • Sessions save mode. Determines how session changes are tracked and saved to the session store.

    org.springframework.boot.autoconfigure.session.JdbcSessionProperties.

    How can I configure this property?

  • spring.session.jdbc.schema=classpath:org/springframework/session/jdbc/schema-@@platform@@.sql
  • Path to the SQL file to use to initialize the database schema.

    org.springframework.boot.autoconfigure.session.JdbcSessionProperties.

    How can I configure this property?

  • spring.session.jdbc.table-name=SPRING_SESSION
  • Name of the database table used to store sessions.

    org.springframework.boot.autoconfigure.session.JdbcSessionProperties.

    How can I configure this property?

  • spring.session.mongodb.collection-name=sessions
  • Collection name used to store sessions.

    org.springframework.boot.autoconfigure.session.MongoSessionProperties.

    How can I configure this property?

  • spring.session.redis.cleanup-cron=0 * * * * *
  • Cron expression for expired session cleanup job. Only supported when repository-type is set to indexed.

    org.springframework.boot.autoconfigure.session.RedisSessionProperties.

    How can I configure this property?

  • spring.session.redis.configure-action=notify-keyspace-events
  • The configure action to apply when no user defined ConfigureRedisAction bean is present.

    org.springframework.boot.autoconfigure.session.RedisSessionProperties.

    How can I configure this property?

  • spring.session.redis.flush-mode=on-save
  • Sessions flush mode. Determines when session changes are written to the session store.

    org.springframework.boot.autoconfigure.session.RedisSessionProperties.

    How can I configure this property?

  • spring.session.redis.namespace=spring:session
  • Namespace for keys used to store sessions.

    org.springframework.boot.autoconfigure.session.RedisSessionProperties.

    How can I configure this property?

  • spring.session.redis.repository-type=default
  • Type of Redis session repository to configure.

    org.springframework.boot.autoconfigure.session.RedisSessionProperties.

    How can I configure this property?

  • spring.session.redis.save-mode=on-set-attribute
  • Sessions save mode. Determines how session changes are tracked and saved to the session store.

    org.springframework.boot.autoconfigure.session.RedisSessionProperties.

    How can I configure this property?

  • spring.session.servlet.filter-dispatcher-types=asyncerrorrequest
  • Session repository filter dispatcher types.

    org.springframework.boot.autoconfigure.session.SessionProperties$Servlet.

    How can I configure this property?

  • spring.session.servlet.filter-order=
  • Session repository filter order.

    org.springframework.boot.autoconfigure.session.SessionProperties$Servlet.

    How can I configure this property?

  • spring.session.timeout=
  • Session timeout. If a duration suffix is not specified, seconds will be used.

    org.springframework.boot.autoconfigure.session.SessionProperties.

    How can I configure this property?

    Configuration Metadata

    The collection of configuration properties listed in this section are automatically generated from the CAS source and components that contain the actual field definitions, types, descriptions, modules, etc. This metadata may not always be 100% accurate, or could be lacking details and sufficient explanations.

    Be Selective

    This section is meant as a guide only. Do NOT copy/paste the entire collection of settings into your CAS configuration; rather pick only the properties that you need. Do NOT enable settings unless you are certain of their purpose and do NOT copy settings into your configuration only to keep them as reference. All these ideas lead to upgrade headaches, maintenance nightmares and premature aging.

    YAGNI

    Note that for nearly ALL use cases, declaring and configuring properties listed here is sufficient. You should NOT have to explicitly massage a CAS XML/Java/etc configuration file to design an authentication handler, create attribute release policies, etc. CAS at runtime will auto-configure all required changes for you. If you are unsure about the meaning of a given CAS setting, do NOT turn it on without hesitation. Review the codebase or better yet, ask questions to clarify the intended behavior.

    Naming Convention

    Property names can be specified in very relaxed terms. For instance cas.someProperty, cas.some-property, cas.some_property are all valid names. While all forms are accepted by CAS, there are certain components (in CAS and other frameworks used) whose activation at runtime is conditional on a property value, where this property is required to have been specified in CAS configuration using kebab case. This is both true for properties that are owned by CAS as well as those that might be presented to the system via an external library or framework such as Spring Boot, etc.

    :information_source: Note

    When possible, properties should be stored in lower-case kebab format, such as cas.property-name=value. The only possible exception to this rule is when naming actuator endpoints; The name of the actuator endpoints (i.e. ssoSessions) MUST remain in camelCase mode.

    Settings and properties that are controlled by the CAS platform directly always begin with the prefix cas. All other settings are controlled and provided to CAS via other underlying frameworks and may have their own schemas and syntax. BE CAREFUL with the distinction. Unrecognized properties are rejected by CAS and/or frameworks upon which CAS depends. This means if you somehow misspell a property definition or fail to adhere to the dot-notation syntax and such, your setting is entirely refused by CAS and likely the feature it controls will never be activated in the way you intend.

    Validation

    Configuration properties are automatically validated on CAS startup to report issues with configuration binding, specially if defined CAS settings cannot be recognized or validated by the configuration schema. Additional validation processes are also handled via Configuration Metadata and property migrations applied automatically on startup by Spring Boot and family.

    Indexed Settings

    CAS settings able to accept multiple values are typically documented with an index, such as cas.some.setting[0]=value. The index [0] is meant to be incremented by the adopter to allow for distinct multiple configuration blocks.

    Doing so will likely require you to also enable sticky sessions and/or session replication in a clustered deployment of CAS.

    :warning: Usage Warning!

    Generally speaking, you do not need to enable server-side sessions unless you have a rather specialized deployment or are in need of features that store bits and pieces of data into a sever-backed session object. It is recommended that you stick with the default client-side session storage and only switch if and when mandated by a specific CAS behavior.

    Hazelcast Session Replication

    If you don’t wish to use the native container’s strategy for session replication, you can use CAS’s support for Hazelcast session replication.

    This feature is enabled via the following module:

    1
    2
    3
    4
    5
    
    <dependency>
        <groupId>org.apereo.cas</groupId>
        <artifactId>cas-server-support-session-hazelcast</artifactId>
        <version>${cas.version}</version>
    </dependency>
    
    1
    
    implementation "org.apereo.cas:cas-server-support-session-hazelcast:${project.'cas.version'}"
    
    1
    2
    3
    4
    5
    6
    7
    8
    9
    
    dependencyManagement {
        imports {
            mavenBom "org.apereo.cas:cas-server-support-bom:${project.'cas.version'}"
        }
    }
    
    dependencies {
        implementation "org.apereo.cas:cas-server-support-session-hazelcast"
    }
    
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    
    dependencies {
        /*
            The following platform references should be included automatically and are listed here for reference only.
    
            implementation enforcedPlatform("org.apereo.cas:cas-server-support-bom:${project.'cas.version'}")
            implementation platform(org.springframework.boot.gradle.plugin.SpringBootPlugin.BOM_COORDINATES)
            
        */
        implementation "org.apereo.cas:cas-server-support-session-hazelcast"
    }
    

    The following settings and properties are available from the CAS configuration catalog:

    The configuration settings listed below are tagged as Required in the CAS configuration metadata. This flag indicates that the presence of the setting may be needed to activate or affect the behavior of the CAS feature and generally should be reviewed, possibly owned and adjusted. If the setting is assigned a default value, you do not need to strictly put the setting in your copy of the configuration, but should review it nonetheless to make sure it matches your deployment expectations.

  • cas.webflow.session.server.hazelcast.cluster.core.instance-name=
  • The instance name.

    This setting supports the Spring Expression Language.

    org.apereo.cas.configuration.model.support.hazelcast.HazelcastCoreClusterProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.network.members=
  • Sets the well known members. If members is empty, calling this method will have the same effect as calling clear(). A member can be a comma separated string, e..g 10.11.12.1,10.11.12.2 which indicates multiple members are going to be added. The list of members must include ALL CAS server node, including the current node that owns this configuration.

    org.apereo.cas.configuration.model.support.hazelcast.HazelcastNetworkClusterProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.network.port=5701
  • You can specify the ports which Hazelcast will use to communicate between cluster members. The name of the parameter for this is port and its default value is 5701. By default, Hazelcast will try 100 ports to bind. Meaning that, if you set the value of port as 5701, as members are joining to the cluster, Hazelcast tries to find ports between 5701 and 5801.

    org.apereo.cas.configuration.model.support.hazelcast.HazelcastNetworkClusterProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.discovery.aws.access-key=
  • AWS access key.

    org.apereo.cas.configuration.model.support.hazelcast.discovery.HazelcastAwsDiscoveryProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.discovery.aws.secret-key=
  • AWS secret key.

    org.apereo.cas.configuration.model.support.hazelcast.discovery.HazelcastAwsDiscoveryProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.discovery.azure.client-id=
  • The Azure Active Directory Service Principal client ID.

    org.apereo.cas.configuration.model.support.hazelcast.discovery.HazelcastAzureDiscoveryProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.discovery.azure.client-secret=
  • The Azure Active Directory Service Principal client secret.

    org.apereo.cas.configuration.model.support.hazelcast.discovery.HazelcastAzureDiscoveryProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.discovery.azure.cluster-id=
  • The name of the tag on the hazelcast vm resources. With every Hazelcast Virtual Machine you deploy in your resource group, you need to ensure that each VM is tagged with the value of cluster-id defined in your Hazelcast configuration. The only requirement is that every VM can access each other either by private or public IP address.

    org.apereo.cas.configuration.model.support.hazelcast.discovery.HazelcastAzureDiscoveryProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.discovery.azure.group-name=
  • The Azure resource group name of the cluster. You can find this in the Azure portal or CLI.

    org.apereo.cas.configuration.model.support.hazelcast.discovery.HazelcastAzureDiscoveryProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.discovery.azure.subscription-id=
  • The Azure subscription ID.

    org.apereo.cas.configuration.model.support.hazelcast.discovery.HazelcastAzureDiscoveryProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.discovery.azure.tenant-id=
  • The Azure Active Directory tenant ID.

    org.apereo.cas.configuration.model.support.hazelcast.discovery.HazelcastAzureDiscoveryProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.discovery.jclouds.credential=
  • Cloud Provider credential, can be thought of as a password for cloud services.

    org.apereo.cas.configuration.model.support.hazelcast.discovery.HazelcastJCloudsDiscoveryProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.discovery.jclouds.identity=
  • Cloud Provider identity, can be thought of as a user name for cloud services.

    org.apereo.cas.configuration.model.support.hazelcast.discovery.HazelcastJCloudsDiscoveryProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.discovery.jclouds.provider=
  • String value that is used to identify ComputeService provider. For example, "google-compute-engine" is used for Google Cloud services. See here for more info.

    org.apereo.cas.configuration.model.support.hazelcast.discovery.HazelcastJCloudsDiscoveryProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.discovery.zookeeper.group=
  • Name of this Hazelcast cluster. You can have multiple distinct clusters to use the same ZooKeeper installation

    org.apereo.cas.configuration.model.support.hazelcast.discovery.HazelcastZooKeeperDiscoveryProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.discovery.zookeeper.path=/discovery/hazelcast
  • Path in zookeeper to be used for auto-discovery of members where members are tracked.

    org.apereo.cas.configuration.model.support.hazelcast.discovery.HazelcastZooKeeperDiscoveryProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.discovery.zookeeper.url=
  • Zookeeper url address typically in the format of ip-address:port.

    org.apereo.cas.configuration.model.support.hazelcast.discovery.HazelcastZooKeeperDiscoveryProperties.

    How can I configure this property?

    The configuration settings listed below are tagged as Optional in the CAS configuration metadata. This flag indicates that the presence of the setting is not immediately necessary in the end-user CAS configuration, because a default value is assigned or the activation of the feature is not conditionally controlled by the setting value. In other words, you should only include this field in your configuration if you need to modify the default value or if you need to turn on the feature controlled by the setting.

  • cas.webflow.session.server.hazelcast.cluster.core.async-backup-count=0
  • Hazelcast supports both synchronous and asynchronous backups. By default, backup operations are synchronous. In this case, backup operations block operations until backups are successfully copied to backup members (or deleted from backup members in case of remove) and acknowledgements are received. Therefore, backups are updated before a put operation is completed, provided that the cluster is stable. Asynchronous backups, on the other hand, do not block operations. They are fire and forget and do not require acknowledgements; the backup operations are performed at some point in time.

    org.apereo.cas.configuration.model.support.hazelcast.HazelcastCoreClusterProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.core.async-fillup=true
  • Used when replication is turned on with #isReplicated().

    If a new member joins the cluster, there are two ways you can handle the initial provisioning that is executed to replicate all existing values to the new member. Each involves how you configure the async fill up.
    • First, you can configure async fill up to true, which does not block reads while the fill up operation is underway. That way, you have immediate access on the new member, but it will take time until all the values are eventually accessible. Not yet replicated values are returned as non-existing (null).
    • Second, you can configure for a synchronous initial fill up (by configuring the async fill up to false), which blocks every read or write access to the map until the fill up operation is finished. Use this with caution since it might block your application from operating.

    org.apereo.cas.configuration.model.support.hazelcast.HazelcastCoreClusterProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.core.backup-count=1
  • To provide data safety, Hazelcast allows you to specify the number of backup copies you want to have. That way, data on a cluster member will be copied onto other member(s). To create synchronous backups, select the number of backup copies. When this count is 1, a map entry will have its backup on one other member in the cluster. If you set it to 2, then a map entry will have its backup on two other members. You can set it to 0 if you do not want your entries to be backed up, e.g., if performance is more important than backing up. The maximum value for the backup count is 6. Sync backup operations have a blocking cost which may lead to latency issues.

    org.apereo.cas.configuration.model.support.hazelcast.HazelcastCoreClusterProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.core.cp-member-count=0
  • CP Subsystem is a component of a Hazelcast cluster that builds a strongly consistent layer for a set of distributed data structures. Its data structures are CP with respect to the CAP principle, i.e., they always maintain linearizability and prefer consistency over availability during network partitions. Besides network partitions, CP Subsystem withstands server and client failures. All members of a Hazelcast cluster do not necessarily take part in CP Subsystem. The number of Hazelcast members that take part in CP Subsystem is specified here. CP Subsystem must have at least 3 CP members.

    org.apereo.cas.configuration.model.support.hazelcast.HazelcastCoreClusterProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.core.eviction-policy=LRU
  • Hazelcast supports policy-based eviction for distributed maps. Currently supported policies are LRU (Least Recently Used) and LFU (Least Frequently Used) and NONE. See this for more info.

    org.apereo.cas.configuration.model.support.hazelcast.HazelcastCoreClusterProperties.

    How can I configure this property?

  • cas.webflow.session.server.hazelcast.cluster.core.logging-type=slf4j
  • Hazelcast has a flexible logging configuration and doesn't depend on any logging framework except JDK logging. It has in-built adaptors for a number of logging frameworks and also supports custom loggers by providing logging interfaces. To use built-in adaptors you should set this setting to one of predefined types below.

    • jdk: JDK logging
    • log4j: Log4j
    • slf4j: Slf4j
    • none: Disable logging

    org.apereo.cas.configuration.model.support.hazelcast.HazelcastCoreClusterProperties.

    How can I configure this property?