I've updated to elasticsearch java library version 5.2.0.
In 2.x,
I was using SearchRequestBuilder.addField() in order to add a field to the search request. Nevertheless, It seems to be replaced. I've written the available methods intellisense is showing me. Which of them do I need to pick?
addDocValueField
addFieldDataField
addScriptField
addStoredField
storedFields
fields
SearchRequestBuilder.setNoFields is also removed. Which would be the alternative?
Currently, I'm calling scripts from Java using this code. Is there any more elegant way to call it in 5.x Java API?
Code:
return AggregationBuilders
.terms(this.getName())
.field(this.getName())
.script(new Script(
ScriptType.FILE,
"painless",
"year",
ImmutableMap.of("field", this.getName())
)
);
As you can see I setting field as script parameter. Nevertheless, I don't quite understand how to get it from script code.
Thanks.
When in doubt, go to the source
use setFetchSource(String[] includes, String[] excludes) instead
use setFetchSource(false) instead
if you need to execute this script for each document, you can use addScriptField()
Related
There are some samples on http://www.mybatis.org/mybatis-dynamic-sql/docs/select.html.
I want to implement limit/offset for mysql but failed to see any document on describing how to extend this library to support additional where condition.
here is what i'd like to achieve:
SelectStatementProvider selectStatement = select(id, animalName, bodyWeight, brainWeight)
.from(animalData)
.where(id, isIn(1, 5, 7))
.and(bodyWeight, isBetween(1.0).and(3.0))
.orderBy(id.descending(), bodyWeight)
.limit(1).offset(10)
.build()
.render(RenderingStrategy.MYBATIS3);
There are a couple of resources you can use.
This page - http://www.mybatis.org/mybatis-dynamic-sql/docs/whereClauses.html - shows an example of using standalone where clauses to build a paging query. This is not exactly what you are looking for, but it shows one way to do it.
There is a unit test showing something that is closer to what you are looking for here - https://github.com/mybatis/mybatis-dynamic-sql/tree/master/src/test/java/examples/paging. This code works for MySQL and you could use it as is.
I hope to make this a little easier in a future release.
How do i implement highlighting with the new 5.x Version of elasticsearch Java Api?
This is my queryBuilder:
SearchRequestBuilder searchRequestBuilder = this.client.prepareSearch...
In previous versions we could simply add a field to be highlighted:
searchRequestBuilder.addHighlightedField('name');
But this is not possible anymore.
Can anyone provide a quick example?
You have to use HighlightBuilder under package org.elasticsearch.search.fetch.subphase.highlight and pass it to SearchRequestBuilder's highlight(HighlightBuilder highlightBuilder) method
Is there a way to call solrs analysis api in java using solr-core and get the analyzed tokens.
Analysis api takes fieldName or fieldType and values and give the analyzed tokens.
Is there a way to get those tokens from java?
I found the following link: FieldAnalysisRequestHandler, But I could not get any examples to use it.
In the Admin UI (for which the FieldAnalysisRequestHandler is meant) you can call it by selecting a core and then go to the "Analysis" entry.
See https://cwiki.apache.org/confluence/x/UYDxAQ or https://cwiki.apache.org/confluence/x/FoDxAQ for that.
From a client (which I guess you mean, as you tagged this question with solrj) you need to call the correct URL.
Typically the FieldAnalysisRequestHandler is bound to /analysis/field, see your solrconfig.xml.
From Solrj it should work like this:
SolrQuery query = new SolrQuery();
solrQuery.setRequestHandler("/analysis/field");
solrQuery.set("analysis.fieldtype", "mytype");
solrQuery.set("analysis.fieldvalue", "myval");
QueryResponse solrResponse = solrServer.query(solrQuery);
But it doesn't seem like there's a great support for this in Solrj, probably because it's meant to be called from the Solr Admin UI as mentioned.
I'd like to use the TFS Java API to run WIQL queries on the workitemlinks. I know how to fetch WorkItems via the WorkItemClient, but it seems to be missing the functionality to fetch WorkItemLinks.
On the other hand, client.supportsLinkQueries() returns true. So: Is there a way to run workitemlinks queries with the TFS Java API?
After some more digging around, I found that you can create a link query and run it like this:
WorkItemLinkInfo[] infos = client.createQuery("select * from workitemlinks").runLinkQuery()
Seems like they forgot to add the convenience method to the WorkItemClient.
I'm trying to use boilerpipe from JRuby. I've seen the guide for calling Java from JRuby, and have used it successfully with another Java package, but can't figure out why the same thing isn't working with boilerpipe.
I'm trying to basically do the equivalent of this Java from JRuby:
URL url = new URL("http://www.example.com/some-location/index.html");
String text = ArticleExtractor.INSTANCE.getText(url);
Tried this in JRuby:
require 'java'
url = java.net.URL.new("http://www.example.com/some-location/index.html")
text = Java::DeL3sBoilerpipeExtractors::ArticleExtractor.INSTANCE.getText(url)
This is based on the API Javadocs for boilerpipe. Here's the error:
jruby-1.6.0 :042 > Java::DeL3sBoilerpipeExtractors::ArticleExtractor
NameError: cannot load Java class deL3sBoilerpipeExtractors.ArticleExtractor
from org/jruby/javasupport/JavaClass.java:1195:in `for_name'
from org/jruby/javasupport/JavaUtilities.java:34:in `get_proxy_class'
from /usr/local/rvm/rubies/jruby-1.6.0/lib/ruby/site_ruby/shared/builtin/javasupport/java.rb:45:in `const_missing'
from (irb):42:in `evaluate'
from org/jruby/RubyKernel.java:1087:in `eval'
from /usr/local/rvm/rubies/jruby-1.6.0/lib/ruby/1.8/irb.rb:158:in `eval_input'
from /usr/local/rvm/rubies/jruby-1.6.0/lib/ruby/1.8/irb.rb:271:in `signal_status'
from /usr/local/rvm/rubies/jruby-1.6.0/lib/ruby/1.8/irb.rb:270:in `signal_status'
from /usr/local/rvm/rubies/jruby-1.6.0/lib/ruby/1.8/irb.rb:155:in `eval_input'
from org/jruby/RubyKernel.java:1417:in `loop'
from org/jruby/RubyKernel.java:1190:in `catch'
from /usr/local/rvm/rubies/jruby-1.6.0/lib/ruby/1.8/irb.rb:154:in `eval_input'
from /usr/local/rvm/rubies/jruby-1.6.0/lib/ruby/1.8/irb.rb:71:in `start'
from org/jruby/RubyKernel.java:1190:in `catch'
from /usr/local/rvm/rubies/jruby-1.6.0/lib/ruby/1.8/irb.rb:70:in `start'
from /usr/local/rvm/rubies/jruby-1.6.0/bin/irb:17:in `(root)'
Looks like it didn't parse the camelcase into the appropriate Java package name. What am I doing wrong? I believe I've set up my classpath alright (last 3 entries), though there may be some conflict with xerces possibly being included twice:
$ echo $CLASSPATH
:/jellly/Maui1.2:/jellly/Maui1.2/src:/jellly/Maui1.2/bin:/jellly/Maui1.2/lib/commons-io-1.4.jar:/jellly/Maui1.2/lib/commons-logging.jar:/jellly/Maui1.2/lib/icu4j_3_4.jar:/jellly/Maui1.2/lib/iri.jar:/jellly/Maui1.2/lib/jena.jar:/jellly/Maui1.2/lib/maxent-2.4.0.jar:/jellly/Maui1.2/lib/mysql-connector-java-3.1.13-bin.jar:/jellly/Maui1.2/lib/opennlp-tools-1.3.0.jar:/jellly/Maui1.2/lib/snowball.jar:/jellly/Maui1.2/lib/trove.jar:/jellly/Maui1.2/lib/weka.jar:/jellly/Maui1.2/lib/wikipediaminer1.1.jar:/jellly/Maui1.2/lib/xercesImpl.jar:/jellly/boilerpipe-1.1.0/boilerpipe-1.1.0.jar:/jellly/boilerpipe-1.1.0/lib/nekohtml-1.9.13.jar:/jellly/boilerpipe-1.1.0/lib/xerces-2.9.1.jar
I'd recommend against trying to guess the module name we put under Java::, since for unusual packages it can get mangled pretty badly. Use java_import 'your.weird.package.ArticleExtractor' or if all the package components are compatible with Ruby method naming, you can also do Java::your.weird.package.ArticleExtractor.
Also, since you might run into this... you'll want to reference the INSTANCE variable as ArticleExtractor::INSTANCE, since we map it as a Ruby constant.
Have fun!
You can also use the nice Jruby Boilerpipe Gem which wraps the Java code
Or the pure ruby implementation of Boilerpipe Ruby Boilerpipe Gem
require 'boilerpipe'
Boilerpipe::Extractors::ArticleExtractor.text("https://github.com/jruby/jruby/wiki/AboutJRuby")