Memcached Monitoring

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<dependency>
    <groupId>org.apereo.cas</groupId>
    <artifactId>cas-server-support-memcached-monitor</artifactId>
    <version>${cas.version}</version>
</dependency>
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implementation "org.apereo.cas:cas-server-support-memcached-monitor:${project.'cas.version'}"
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dependencyManagement {
    imports {
        mavenBom "org.apereo.cas:cas-server-support-bom:${project.'cas.version'}"
    }
}

dependencies {
    implementation "org.apereo.cas:cas-server-support-memcached-monitor"
}
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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-memcached-monitor"
}
:warning: Usage

This feature is deprecated and is scheduled to be removed in the future.

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.monitor.memcached.servers=localhost:11211
  • Comma-separated list of memcached servers.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

    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.monitor.memcached.daemon=true
  • Set the daemon state of the IO thread (defaults to true).

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.failure-mode=Redistribute
  • Failure mode. Acceptable values are Redistribute,Retry,Cancel.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.hash-algorithm=FNV1_64_HASH
  • Hash algorithm. Acceptable values are NATIVE_HASH,CRC_HASH,FNV1_64_HASH,FNV1A_64_HASH,FNV1_32_HASH,FNV1A_32_HASH,KETAMA_HASH.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.kryo-auto-reset=false
  • If true, reset is called automatically after an entire object graph has been read or written. If false, reset must be called manually, which allows unregistered class names, references, and other information to span multiple object graphs.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.kryo-objects-by-reference=false
  • If true, each appearance of an object in the graph after the first is stored as an integer ordinal. When set to true, MapReferenceResolver is used. This enables references to the same object and cyclic graphs to be serialized, but typically adds overhead of one byte per object.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.kryo-registration-required=true
  • If true, an exception is thrown when an unregistered class is encountered.

    If false, when an unregistered class is encountered, its fully qualified class name will be serialized and the default serializer for the class used to serialize the object. Subsequent appearances of the class within the same object graph are serialized as an int id. Registered classes are serialized as an int id, avoiding the overhead of serializing the class name, but have the drawback of needing to know the classes to be serialized up front. See ComponentSerializationPlan for help here.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.locator-type=ARRAY_MOD
  • Locator mode. Acceptable values are ARRAY_MOD, CONSISTENT, VBUCKET.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.max-idle=8
  • Set the value for the maxTotal configuration attribute for pools created with this configuration instance.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.max-reconnect-delay=-1
  • Set the maximum reconnect delay.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.max-total=20
  • Sets the cap on the number of objects that can be allocated by the pool (checked out to clients, or idle awaiting checkout) at a given time. Use a negative value for no limit.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.min-idle=0
  • Get the value for the minIdle configuration attribute for pools created with this configuration instance.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.op-timeout=-1
  • Set the default operation timeout in milliseconds.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.protocol=TEXT
  • Protocol. Acceptable values are TEXT, BINARY.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.should-optimize=false
  • Set to false if the default operation optimization is not desirable.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.shutdown-timeout-seconds=-1
  • The number of seconds to wait for connections to finish before shutting down the client.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.timeout-exception-threshold=2
  • Set the maximum timeout exception threshold.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.transcoder=KRYO
  • Indicate the transcoder type. Available values are as follows:

    • KRYO: CAS transcoder implementation based on Kryo fast serialization framework suited for efficient serialization of tickets. Provides pooling mechanisms as well as control over object registration and sequences.
    • SERIAL: Kryo native transcoder that serializes and compresses objects.
    • WHALIN: Transcoder that provides compatibility with Greg Whalin's memcached client.
    • WHALINV1: Handles old whalin encoding: data type is in the first byte of the value.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.transcoder-compression-threshold=16384
  • For transcoders other than kryo, determines the compression threshold. Does not apply to kryo.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

  • cas.monitor.memcached.use-nagle-algorithm=false
  • Set to true if you'd like to enable the Nagle algorithm.

    org.apereo.cas.configuration.model.core.monitor.MemcachedMonitorProperties.

    How can I configure this property?

    Deprecation status is ERRORwithout a replacement setting.

    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.

    The actual memcached implementation may be supported via one of the following options, expected to be defined in the overlay.

     Reports back general health status of the system, produced by various monitors.

     Reports back general health status of the system, produced by various monitors.


    Spymemcached

    Enable support via the spymemcached library.

    Support is enabled by including the following dependency in the WAR overlay:

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    <dependency>
        <groupId>org.apereo.cas</groupId>
        <artifactId>cas-server-support-memcached-spy</artifactId>
        <version>${cas.version}</version>
    </dependency>
    
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    implementation "org.apereo.cas:cas-server-support-memcached-spy:${project.'cas.version'}"
    
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    dependencyManagement {
        imports {
            mavenBom "org.apereo.cas:cas-server-support-bom:${project.'cas.version'}"
        }
    }
    
    dependencies {
        implementation "org.apereo.cas:cas-server-support-memcached-spy"
    }
    
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    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-memcached-spy"
    }
    

    AWS ElastiCache

    For clusters running the Memcached engine, ElastiCache supports Auto Discovery—the ability for client programs to automatically identify all of the nodes in a cache cluster, and to initiate and maintain connections to all of these nodes.

    Support is enabled by including the following dependency in the WAR overlay:

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    <dependency>
        <groupId>org.apereo.cas</groupId>
        <artifactId>cas-server-support-memcached-aws-elasticache</artifactId>
        <version>${cas.version}</version>
    </dependency>
    
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    implementation "org.apereo.cas:cas-server-support-memcached-aws-elasticache:${project.'cas.version'}"
    
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    dependencyManagement {
        imports {
            mavenBom "org.apereo.cas:cas-server-support-bom:${project.'cas.version'}"
        }
    }
    
    dependencies {
        implementation "org.apereo.cas:cas-server-support-memcached-aws-elasticache"
    }
    
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    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-memcached-aws-elasticache"
    }