Chapter 244. NSQ Component Available as of Camel version 2.23 Available as of Camel version 2.23 NSQ is a realtime distributed messaging platform. Maven users will need to add the following dependency to their pom.xml for this component. <dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-nsq</artifactId> <!-- use the same version as your Camel core version --> <version>x.y.z</version> </dependency> 244.1. URI format nsq:servers[?options] Where servers represents the list of NSQ servers - nsqlookupd servers in the case of a consumer and nsqd servers in the case of a producer. 244.2. Options The NSQ component supports 2 options, which are listed below. Name Description Default Type useGlobalSslContext Parameters (security) Enable usage of global SSL context parameters. false boolean resolveProperty Placeholders (advanced) Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders. true boolean The NSQ endpoint is configured using URI syntax: with the following path and query parameters: 244.2.1. Path Parameters (1 parameters): Name Description Default Type servers Required The hostnames of one or more nsqlookupd servers (consumer) or nsqd servers (producer). String 244.2.2. Query Parameters (16 parameters): Name Description Default Type topic (common) Required The name of topic we want to use String userAgent (common) A String to identify the kind of client String autoFinish (consumer) Automatically finish the NSQ message when it is retrieved from the quese and before the Exchange is processed. true Boolean bridgeErrorHandler (consumer) Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored. false boolean channel (consumer) The name of channel we want to use String lookupInterval (consumer) The lookup retry interval 5000 long lookupServerPort (consumer) The port of the nsqdlookupd server 4161 int messageTimeout (consumer) The NSQ message timeout for a consumer. -1 long poolSize (consumer) Consumer pool size 10 int requeueInterval (consumer) The requeue interval -1 long exceptionHandler (consumer) To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this option is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored. ExceptionHandler exchangePattern (consumer) Sets the exchange pattern when the consumer creates an exchange. ExchangePattern port (producer) The port of the nsqd server 4150 int synchronous (advanced) Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported). false boolean secure (security) Set secure option indicating TLS is required false boolean sslContextParameters (security) To configure security using SSLContextParameters SSLContextParameters 244.3. Spring Boot Auto-Configuration The component supports 3 options, which are listed below. Name Description Default Type camel.component.nsq.enabled Whether to enable auto configuration of the nsq component. This is enabled by default. Boolean camel.component.nsq.resolve-property-placeholders Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders. true Boolean camel.component.nsq.use-global-ssl-context-parameters Enable usage of global SSL context parameters. false Boolean

Commands:
<dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-nsq</artifactId> <!-- use the same version as your Camel core version --> <version>x.y.z</version> </dependency>
nsq:servers[?options]
nsq:servers