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Practical Module Examples generate, create datamatrix none in software projects Microsoft Office Excel Website Getting ready As usual we wi ll write a test to show off what the Solr support should look like. This test should be put inside an application, not inside of the plugin which is created throughout this recipe:. public class S Data Matrix ECC200 for None olrSearchTest extends UnitTest { CommonsHttpSolrServer server; @Before public void setup() throws Exception { Fixtures.deleteAllModels(); server = new CommonsHttpSolrServer("http://localhost:8983/ solr"); server.setRequestWriter(new BinaryRequestWriter()); clearSolrServerIndex(); Fixtures.

loadModels("test-data.yml"); } private void clearSolrServerIndex() throws Exception { server.deleteByQuery( "*:*" ); server.

commit(); } @Test public void testEnhancedSearchCapability() { assertEquals(1, Car.search("byBrandAndType", "BMW", "320"). fetchIds().

size()); List<User> users = User.search("byNameAndTwitter", "a*ex", "spinscale*").fetch(); User user = users.

get(0); User u1 = User.find("byName", "alex").first(); assertEquals(user.

id, u1.id); } }. If you ignore the setup of the test and take a look at the test, you will see the Model. search() method, which looks pretty similar to the Model.find() method.

Its basic function is the same, with the exception that it always queries the Solr index instead of the database. Also, there are two further methods to access the data returned by the Solr query. The first is Model.

search().fetchIds() and the second is Model.search().

fetch(). The first method fetches the IDs from the index, allowing you to get the data out of the database manually, whereas the second method issues the database query automatically..

6 . You also shoul d have a working Solr instance in order to follow this example. You can download the most up to date release of Solr at http://lucene.apache.

org/solr/ and start the example application. It is actually sufficient. Any changes in the configuration file of Solr will be documented in the next section.

After downloading and extracting the archive, you can start Solr by:. cd apache-solr-3.1.0/example java jar start.jar You should now be able to go to http://localhost:8983/solr/ and see a Welcome to Solr message. How to do it... After creating a new module via play new-module solr for a Solr plugin you need to get the dependencies right. As there are several dependencies overlapping with the versions in Play, you have to carefully define what files should be downloaded and what files should not. Create the following dependencies.

yml file and run play dependencies:. self: play -&g Software Data Matrix barcode t; solr 0.1 require: - org.apache.

solr -> solr-solrj 3.1.0: transitive: false - commons-httpclient -> commons-httpclient 3.

1: transitive: false - org.codehaus.woodstox -> wstx-asl 3.

2.7 - stax -> stax-api 1.0.

1. The next step is to put the module together. Do not forget to create an appropriate play.plugins file.

The plugin actually needs only four classes. The first is the SearchableModel, which extends the standard Model class. Put all classes into the play.

modules.solr package:. public class S Data Matrix ECC200 for None earchModel extends Model { public static Query search(String query, String ...

values) { throw new UnsupportedOperationException("Check your configuration. Bytecode enhancement did not happen"); } protected static Query search(Class clazz, String query, String ..

. values) { StringBuilder sb = new StringBuilder(); if (query.startsWith("by")) { query = query.

replaceAll("^by", "");. Practical Module Examples } String field Software Data Matrix barcode Names[] = query.split("And"); for (int i = 0 ; i < fieldNames.length; i++) { String fieldStr = fieldNames[i]; String value = values[i]; String fieldName = StringUtils.

uncapitalize(fieldStr); String solrFieldName = getSolrFieldName(fieldName, clazz); sb.append(solrFieldName); sb.append(":"); sb.

append(value); if (i < fieldNames.length-1) { sb.append(" AND "); } } return new Query(sb.

toString(), clazz); } private static String getSolrFieldName(String fieldName, Class clazz) { try { java.lang.reflect.

Field field = clazz.getField(fieldName); Field annot = field.getAnnotation(Field.

class); if (annot != null && !annot.value().equals("#default")) { return annot.

value(); } } catch (Exception e) { e.printStackTrace(); } return fieldName; } }. The main part of this class is to define the static search() method, which was already used in the test. This method is filled by using bytecode enhancement, so a bytecode enhancer is needed next:. public class S Data Matrix for None olrEnhancer extends Enhancer { public void enhanceThisClass(ApplicationClass applicationClass) throws Exception {. 6 CtClass ctC lass = makeClass(applicationClass); if (!ctClass.subtypeOf(classPool.get("play.

modules.solr. SearchModel"))) { return; } String method = "public static play.

modules.solr. Query search(String query, String[] values) { return search("+applicationClass.

name+".class, query, values); }"; CtMethod count = CtMethod.make(method, ctClass); ctClass.

addMethod(count); // Done. applicationClass.enhancedByteCode = ctClass.

toBytecode(); ctClass.defrost(); Logger.info("Enhanced search of %s", applicationClass.

name); } }. The enhancer r Data Matrix 2d barcode for None eplaces the empty static search() method by invoking the second defined search() method with the class parameter and supplies it during enhancement with this information. As the method does not return entity objects but an object being a Query class, this result class has to be defined as well. The Query class issues the actual query to the Solr server and handles the response:.

public class Q uery { private SolrQuery query; private SolrServer server; private Class clazz; public <T extends Model> Query(String queryString, Class<T> clazz) { query = new SolrQuery(); query.setFilterQueries("searchClass:" + clazz.getName()); query.

setQuery(queryString); this.server = SolrPlugin.getSearchServer(); this.

clazz = clazz; } public Query limit(int limit) { query.setRows(limit); return this;.
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