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https://issues.apache.org/jira/browse/NIFI-7016?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitry Lukyanov updated NIFI-7016:
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Description:
Currently the following methods implemented but they differ from groovy flavor.
All those methods should return the object returned by Closure and
streams/readers/writers must be closed after closure finished.
Check any of this methods in groovy:
http://docs.groovy-lang.org/latest/html/groovy-jdk/java/io/File.html#withOutputStream(groovy.lang.Closure)
The idea of usage like this:
{code:java}
def jsonData = flowFile.withReader("UTF-8"){ new JsonSlurper().parse(it) }
{code}
methods to be fixed according to groovy behavior:
{code:java}
Object withInputStream(Closure closure)
// Creates a new InputStream for this file and passes it into the closure.
// Input stream must be closed after closure finished
// Returns value returned by closure
Object withOutputStream(Closure closure)
// Creates a new OutputStream for this file and passes it into the closure.
// OutputStream must be closed after closure finished.
// Returns value returned by closure
Object withReader(String charset, Closure closure)
// Creates a new BufferedReader for this file using the specified charset and
then passes it into the closure, ensuring the reader is closed after the
closure returns.
// Returns value returned by closure
Object withWriter(String charset, Closure closure)
// Creates a new BufferedWriter for this file, passes it to the closure, and
ensures the stream is flushed and closed after the closure returns.
// Returns value returned by closure
{code}
was:
Currently the following methods implemented but they differ from groovy flavor.
All those methods should return the object returned by Closure and
streams/readers/writers must be closed after closure finished.
Check of this kind of methods - they all returns the value returned by closure.
The idea of usage like this:
{code:java}
def jsonData = flowFile.withReader("UTF-8"){ new JsonSlurper().parse(it) }
{code}
methods to be fixed according to groovy behavior:
{code:java}
Object withInputStream(Closure closure)
// Creates a new InputStream for this file and passes it into the closure.
// Input stream must be closed after closure finished
// Returns value returned by closure
Object withOutputStream(Closure closure)
// Creates a new OutputStream for this file and passes it into the closure.
// OutputStream must be closed after closure finished.
// Returns value returned by closure
Object withReader(String charset, Closure closure)
// Creates a new BufferedReader for this file using the specified charset and
then passes it into the closure, ensuring the reader is closed after the
closure returns.
// Returns value returned by closure
Object withWriter(String charset, Closure closure)
// Creates a new BufferedWriter for this file, passes it to the closure, and
ensures the stream is flushed and closed after the closure returns.
// Returns value returned by closure
{code}
> Make groovy File functions available for FlowFile to simplify scripting
> [modified]
> ----------------------------------------------------------------------------------
>
> Key: NIFI-7016
> URL: https://issues.apache.org/jira/browse/NIFI-7016
> Project: Apache NiFi
> Issue Type: New Feature
> Reporter: Dmitry Lukyanov
> Assignee: Matt Burgess
> Priority: Minor
> Fix For: 1.10.0
>
>
> Currently the following methods implemented but they differ from groovy
> flavor.
> All those methods should return the object returned by Closure and
> streams/readers/writers must be closed after closure finished.
> Check any of this methods in groovy:
> http://docs.groovy-lang.org/latest/html/groovy-jdk/java/io/File.html#withOutputStream(groovy.lang.Closure)
> The idea of usage like this:
> {code:java}
> def jsonData = flowFile.withReader("UTF-8"){ new JsonSlurper().parse(it) }
> {code}
> methods to be fixed according to groovy behavior:
> {code:java}
> Object withInputStream(Closure closure)
> // Creates a new InputStream for this file and passes it into the closure.
> // Input stream must be closed after closure finished
> // Returns value returned by closure
> Object withOutputStream(Closure closure)
> // Creates a new OutputStream for this file and passes it into the closure.
> // OutputStream must be closed after closure finished.
> // Returns value returned by closure
> Object withReader(String charset, Closure closure)
> // Creates a new BufferedReader for this file using the specified charset and
> then passes it into the closure, ensuring the reader is closed after the
> closure returns.
> // Returns value returned by closure
> Object withWriter(String charset, Closure closure)
> // Creates a new BufferedWriter for this file, passes it to the closure, and
> ensures the stream is flushed and closed after the closure returns.
> // Returns value returned by closure
> {code}
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