Understanding an AMF Polling call_问答_开发者_运维开发者技术经验分享

开发者 https://www.devze.com 2023-04-06 03:37 出处：网络

One of my testers is asking me about an AMF polling that we do in our app: flex_amf_call( \"AMF3_call_12\",

One of my testers is asking me about an AMF polling that we do in our app:

flex_amf_call(
    "AMF3_call_12",
    "Gateway=http://test.url.com:22000/InventoryTesting/boa/messagebroker/amfpolling",
    "Snapshot=t19.inf",
    MESSAGE,
    "Method=null",
    "TargetObjectId=/7",
    BEGIN_ARGUMENTS,
    "<AMF3><object-externalizable-custom><flex.messaging.messages.CommandMessage>\n  "
    "<destin开发者_运维百科ation>InvTestMessaging</destination>\n  <messageId>"
    "4AF91854-F89E-F56D-EE22-4EC8BBAEA4BC</messageId>\n  <timestamp>0</timestamp>\n  "
    "<timeToLive>0</timeToLive>\n  <headers>\n    <entry>\n      <string>"
    "DSEndpoint</string>\n      <string>my-polling-amf</string>\n    </entry>\n    "
    "<entry>\n      <string>DSId</string>\n      <string>{ParamDSValue_string}"
    "</string>\n    </entry>\n  </headers>\n  <body serialization=\"custom\" class="
    "\"flex.messaging.io.amf.ASObject\">\n    <unserializable-parents/>\n    <map>\n "
    "     <default>\n        <loadFactor>0.75</loadFactor>\n        <threshold>"
    "12</threshold>\n      </default>\n      <int>16</int>\n      <int>0</int>\n    "
    "</map>\n    <flex.messaging.io.amf.ASObject>\n      <default>\n        "
    "<inHashCode>false</inHashCode>\n        <inToString>false</inToString>\n      "
    "</default>\n    </flex.messaging.io.amf.ASObject>\n  </body>\n  <correlationId/>"
    "\n  <operation>0</operation>\n</flex.messaging.messages.CommandMessage>"
    "</object-externalizable-custom></AMF3>",
    END_ARGUMENTS,
    LAST);

What does this node mean?

<operation>

They are seeing values of 0 and 5.

A CommandMessage with an operation of 0 is a "subscribe" operation, and is sent automatically when a session is initiated with the server under certain circumstances. A CommandMessage with an operation of 5 is a "ping" operation, and the server must respond with an appropriately populated AcknowledgeMessage or AMF communication is terminated. A CommandMessage is automatically sent by the flash player as needed, and whatever server you're using should be appropriately configured to automatically handle them, or provide hooks for their handling (like with login and logout operations).

See http://livedocs.adobe.com/blazeds/1/javadoc/flex/messaging/messages/CommandMessage.html for more details about the CommandMessage.