DNS
Available as of Camel 2.7
This is an additional component for Camel to run DNS queries, using DNSJava. The component is a thin layer on top of DNSJava.
The component offers the following operations:
- ip, to resolve a domain by its ip
- lookup, to lookup information about the domain
- dig, to run DNS queries
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The DNSJava library requires running on the SUN JVM.
If you use Apache ServiceMix or Apache Karaf, you'll need to adjust the etc/jre.properties file, to add sun.net.spi.nameservice to the list of Java platform packages exported. The server will need restarting before this change takes effect. |
Maven users will need to add the following dependency to their pom.xml for this component:
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<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-dns</artifactId>
<version>x.x.x</version>
<!-- use the same version as your Camel core version -->
</dependency>
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The URI scheme for a DNS component is as follows
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dns://operation[?options]
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This component only supports producers.
Options
None.
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Header | Type | Operations | Description |
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dns.domain | String | ip | The domain name. Mandatory. | dns.name | String | lookup | The name to lookup. Mandatory. | dns.type | | lookup, dig | The type of the lookup. Should match the values of org.xbill.dns.Type. Optional. | dns.class | | lookup, dig | The DNS class of the lookup. Should match the values of org.xbill.dns.DClass. Optional. | dns.query | String | dig | The query itself. Mandatory. | dns.server | String | dig | The server in particular for the query. If none is given, the default one specified by the OS will be used. Optional. |
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Examples
IP lookup
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<route id="IPCheck">
<from uri="direct:start"/>
<to uri="dns:ip"/>
</route>
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This looks up a domain's IP. For example, www.example.com resolves to 192.0.32.10.
The IP address to lookup must be provided in the header with key "dns.domain".
DNS lookup
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<route id="IPCheck">
<from uri="direct:start"/>
<to uri="dns:lookup"/>
</route>
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This returns a set of DNS records associated with a domain.
The name to lookup must be provided in the header with key "dns.name".
DNS Dig
Dig is a Unix command-line utility to run DNS queries.
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<route id="IPCheck">
<from uri="direct:start"/>
<to uri="dns:dig"/>
</route>
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The query must be provided in the header with key "dns.query".
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