Question

可以使用C ++ Actor Framework以保证两个actor之间的消息排序吗？我在the manual找不到任何相关内容。

Answer 1

如果您只有两个演员直接与进行通信，CAF会保证邮件按照发送顺序到达。只有多跳场景才会导致非确定性和消息重新排序。

 <subsystem xmlns="urn:jboss:domain:datasources:1.2">
        <datasources>
            <datasource jta="false" jndi-name="java:jboss/datasources/ams" pool-name="OracleDS" enabled="true" use-ccm="false">
                <connection-url>jdbc:oracle:thin:@rhhqrac01scant:1521/testingenv</connection-url>
                <driver-class>oracle.jdbc.OracleDriver</driver-class>
                <driver>oracle</driver>
                <pool>
                    <min-pool-size>100</min-pool-size>
                    <max-pool-size>150</max-pool-size>
                    <prefill>true</prefill>
                    <flush-strategy>FailingConnectionOnly</flush-strategy>
                </pool>
                <security>
                    <user-name>ams</user-name>
                    <password>testpassword</password>
                </security>
                <validation>
                    <check-valid-connection-sql>select 1 from dual</check-valid-connection-sql>
                    <validate-on-match>false</validate-on-match>
                    <background-validation>false</background-validation>
                </validation>
                <timeout>
                    <set-tx-query-timeout>false</set-tx-query-timeout>
                    <blocking-timeout-millis>0</blocking-timeout-millis>
                    <idle-timeout-minutes>0</idle-timeout-minutes>
                    <query-timeout>0</query-timeout>
                    <use-try-lock>0</use-try-lock>
                    <allocation-retry>0</allocation-retry>
                    <allocation-retry-wait-millis>0</allocation-retry-wait-millis>
                </timeout>
                <statement>
                    <share-prepared-statements>false</share-prepared-statements>
                </statement>
            </datasource>
            <drivers>
                <driver name="oracle" module="com.oracle.ojdbc6">
                    <xa-datasource-class>oracle.jdbc.OracleDriver</xa-datasource-class>
                </driver>
            </drivers>
        </datasources>
    </subsystem>

在接收端，可以通过auto a = spawn(A); self->send(a, "foo"); self->send(a, 42); // arrives always after "foo"更改演员行为来更改消息处理顺序：

become

在上面的示例中，这将处理[=](int) { self->become( keep_behavior, [=](const std::string&) { self->unbecome(); } ); }消息之前的int，即使它们在演员的邮箱中以相反的顺序到达。

C ++ Actor Framework是否保证消息顺序？

1 个答案: