136.3. multimap cache producer - to"hazelcast-multimap:foo")


多映射是一个缓存,您可以将 n 个值存储到一个键。多图生成者提供 4 个操作(put, get, removevalue, delete)。

请求消息的标头变量:

Expand
Name类型描述

CamelHazelcastOperationType

字符串

有效值为: put, get, removevalue, delete From Camel 2.16: clear.

CamelHazelcastObjectId

字符串

在缓存中存储 / 的对象 ID

136.3.1. 放置 的示例:

Java DSL:

from("direct:put")
.setHeader(HazelcastConstants.OPERATION, constant(HazelcastOperation.PUT))
.to(String.format("hazelcast-%sbar", HazelcastConstants.MULTIMAP_PREFIX));

Spring DSL:

<route>
    <from uri="direct:put" />
    <log message="put.."/>
        <!-- If using version 2.8 and above set headerName to "CamelHazelcastOperationType" -->
    <setHeader headerName="hazelcast.operation.type">
        <constant>put</constant>
    </setHeader>
    <to uri="hazelcast-multimap:foo" />
</route>

136.3.2. removevalue 示例:

Java DSL:

from("direct:removevalue")
.setHeader(HazelcastConstants.OPERATION, constant(HazelcastOperation.REMOVE_VALUE))
.toF("hazelcast-%sbar", HazelcastConstants.MULTIMAP_PREFIX);

Spring DSL:

<route>
    <from uri="direct:removevalue" />
    <log message="removevalue..."/>
        <!-- If using version 2.8 and above set headerName to "CamelHazelcastOperationType" -->
    <setHeader headerName="hazelcast.operation.type">
        <constant>removevalue</constant>
    </setHeader>
    <to uri="hazelcast-multimap:foo" />
</route>

要删除一个值,您必须提供要在消息正文中删除的值。如果您有多映射对象 \{key: "4711" values: { "my-foo", "my-bar"}},您必须在消息正文中放置 "my-foo" 值来删除 "my-foo" 值。

136.3.3. get 的示例:

Java DSL:

from("direct:get")
.setHeader(HazelcastConstants.OPERATION, constant(HazelcastOperation.GET))
.toF("hazelcast-%sbar", HazelcastConstants.MULTIMAP_PREFIX)
.to("seda:out");

Spring DSL:

<route>
    <from uri="direct:get" />
    <log message="get.."/>
        <!-- If using version 2.8 and above set headerName to "CamelHazelcastOperationType" -->
    <setHeader headerName="hazelcast.operation.type">
        <constant>get</constant>
    </setHeader>
    <to uri="hazelcast-multimap:foo" />
    <to uri="seda:out" />
</route>

136.3.4. 删除 示例:

Java DSL:

from("direct:delete")
.setHeader(HazelcastConstants.OPERATION, constant(HazelcastOperation.DELETE))
.toF("hazelcast-%sbar", HazelcastConstants.MULTIMAP_PREFIX);

Spring DSL:

<route>
    <from uri="direct:delete" />
    <log message="delete.."/>
        <!-- If using version 2.8 and above set headerName to "CamelHazelcastOperationType" -->
    <setHeader headerName="hazelcast.operation.type">
        <constant>delete</constant>
    </setHeader>
    <to uri="hazelcast-multimap:foo" />
</route>

您可以在测试类中调用它们:

template.sendBodyAndHeader("direct:[put|get|removevalue|delete]", "my-foo", HazelcastConstants.OBJECT_ID, "4711");
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