Fuse ESB Enterprise - EIP Component Reference

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 address.
lookup: To look up information about the domain.
dig: To run DNS queries.

	Requires SUN JVM
	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:

<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>

URI format

The URI scheme for a DNS component is as follows

dns://operation

This component only supports producers.

Options

None.

Headers

Header	Type	Operations	Description
`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`	he 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.

Examples

IP lookup

        <route id="IPCheck">
            <from uri="direct:start"/>
            <to uri="dns:ip"/>
        </route>

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

        <route id="IPCheck">
            <from uri="direct:start"/>
            <to uri="dns:lookup"/>
        </route>

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.

        <route id="IPCheck">
            <from uri="direct:start"/>
            <to uri="dns:dig"/>
        </route>

The query must be provided in the header with key "dns.query".