${variable.name}
substitution)xml<dependency> <groupId>org.apache.storm</groupId> <artifactId>flux-core</artifactId> <version>${storm.version}</version></dependency>
xml<dependency> <groupId>org.apache.storm</groupId> <artifactId>flux-wrappers</artifactId> <version>${storm.version}</version></dependency>
storm jar
command. For example, if your fat jar is named myTopology-0.1.0-SNAPSHOT.jar
youcould run it locally with the command:storm
command, and allows any other command lineswitches to pass through to the storm
command.storm
command switch -c
to override a topology configuration property. The followingexample command will run Flux and override the nimbus.seeds
configuration:org.apache.storm.generated.StormTopology
instance:topologySource
definition..properties
file and havethem substituted before the .yaml
file is parsed.--filter
command line option and specify a .properties
file. For example,if you invoked flux like so:dev.properties
file:.yaml
file using ${}
syntax:${kafka.zookeeper.hosts}
with localhost:2181
before parsing the YAML contents.ZK_HOSTS
if defined,you can reference it in a Flux YAML file with the following syntax:org.apache.storm.kafka.StringScheme
class available as a reference under the key'stringScheme'
. This assumes the org.apache.storm.kafka.StringScheme
has a default constructor.contructorArgs
element to a components.constructorArgs
is a list of objects that will be passed to the class' constructor. The following example creates anobject by calling the constructor that takes a single string as an argument:ref
tag.'stringScheme'
is created, and later referenced, as a an argumentto another component's constructor:public
:properties
declaration will cause Flux to look for a public method in the SpoutConfig
withthe signature setIgnoreZkOffsets(boolean b)
and attempt to invoke it. If a setter method is not found, Flux will thenlook for a public instance variable with the name ignoreZkOffsets
and attempt to set its value.enum
s in Contructor Arguments, References, Properties and Configuration Methodsenum
values as arguments in a Flux YAML file, simply by referencing the name of the enum
.enum
definition (simplified for brevity):org.apache.storm.hdfs.bolt.rotation.FileSizeRotationPolicy
class has the following constructor:component
definition could be used to call the constructor:config
section is simply a map of Storm topology configuration parameters that will be passed to theorg.apache.storm.StormSubmitter
as an instance of the org.apache.storm.Config
class:getTopology()
instance method with one of the following signatures:getTopology
), you canoverride it:java.util.Map<String, Object>
ororg.apache.storm.Config
, and return a org.apache.storm.generated.StormTopology
object.component
definition that add a parallelism
parameter that sets the parallelism for acomponent when the topology is deployed.component
they support constructor arguments, references, and properties aswell. Papers 3 4 10 download free.name
: A name for the connection (optional, currently unused)from
: The id
of a Spout or Bolt that is the source (publisher)to
: The id
of a Spout or Bolt that is the destination (subscriber)grouping
: The stream grouping definition for the Streamtype
: The type of grouping. One of ALL
,CUSTOM
,DIRECT
,SHUFFLE
,LOCAL_OR_SHUFFLE
,FIELDS
,GLOBAL
, or NONE
.streamId
: The Storm stream ID (Optional. If unspecified will use the default stream)args
: For the FIELDS
grouping, a list of field names.customClass
For the CUSTOM
grouping, a definition of custom grouping class instancestreams
definition example below sets up a topology with the following wiring:CUSTOM
and defining a customClass
parameterthat tells Flux how to instantiate the custom class. The customClass
definition extends component
, so it supportsconstructor arguments, references, and properties as well.org.apache.storm.testing.NGrouping
custom stream groupingclass.resource
property is set to true
, the include will be loaded as a classpath resource from the value of thefile
attribute, otherwise it will be treated as a regular file.override
property controls how includes affect the values defined in the current file. If override
is set totrue
, values in the included file will replace values in the current file being parsed. If override
is set tofalse
, values in the current file being parsed will take precedence, and the parser will refuse to replace them.