Examples of org.apache.solr.request.SolrRequestHandler

org.apache.solr.request.SolrRequestHandler
Implementations of SolrRequestHandler are called to handle query requests. Different SolrRequestHandlers are registered with the SolrCore. One way to register a SolrRequestHandler with the core is thorugh the solrconfig.xml file.
Example solrconfig.xml entry to register a SolrRequestHandler implementation to handle all queries with a query type of "test":
<requestHandler name="test" class="solr.tst.TestRequestHandler" />
A single instance of any registered SolrRequestHandler is created via the default constructor and is reused for all relevant queries. @version $Id: SolrRequestHandler.java 898152 2010-01-12 02:19:56Z ryan $

    params.add(TermsParams.TERMS_LOWER,  "aa");
    params.add(TermsParams.TERMS_LOWER_INCLUSIVE, "false");
    params.add(TermsParams.TERMS_PREFIX_STR, "aa");
    params.add(TermsParams.TERMS_UPPER, "b");
    params.add(TermsParams.TERMS_LIMIT, String.valueOf(50));
    SolrRequestHandler handler;
    SolrQueryResponse rsp;
    NamedList values;
    NamedList terms;
    handler = core.getRequestHandler("/terms");
    assertTrue("handler is null and it shouldn't be", handler != null);
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    terms = (NamedList) ((NamedList) values.get("terms")).get("lowerfilt");
    assertTrue("terms Size: " + terms.size() + " is not: " + 1, terms.size() == 1);
    Object value = terms.get("aaa");
    assertTrue("value is null and it shouldn't be", value != null);

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    params.add(TermsParams.TERMS_LOWER,  "s");
    params.add(TermsParams.TERMS_LOWER_INCLUSIVE, "false");
    params.add(TermsParams.TERMS_PREFIX_STR, "s");
    params.add(TermsParams.TERMS_SORT, TermsParams.TERMS_SORT_COUNT);
    
    SolrRequestHandler handler;
    SolrQueryResponse rsp;
    NamedList values;
    NamedList terms;
    handler = core.getRequestHandler("/terms");
    assertTrue("handler is null and it shouldn't be", handler != null);
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    terms = (NamedList) ((NamedList) values.get("terms")).get("standardfilt");
    assertTrue("terms Size: " + terms.size() + " is not: " + 3, terms.size() == 3);
    assertTrue("Item 0 name is not 'snake'", terms.getName(0).equals("snake"));
    assertTrue("Item 0 frequency is not '3'", (Integer) terms.getVal(0) == 3);

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    params.add(TermsParams.TERMS_LOWER,  "s");
    params.add(TermsParams.TERMS_LOWER_INCLUSIVE, "false");
    params.add(TermsParams.TERMS_PREFIX_STR, "s");
    params.add(TermsParams.TERMS_SORT, TermsParams.TERMS_SORT_INDEX);
    
    SolrRequestHandler handler;
    SolrQueryResponse rsp;
    NamedList values;
    NamedList terms;
    handler = core.getRequestHandler("/terms");
    assertTrue("handler is null and it shouldn't be", handler != null);
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    terms = (NamedList) ((NamedList) values.get("terms")).get("standardfilt");
    assertTrue("terms Size: " + terms.size() + " is not: " + 3, terms.size() == 3);
    assertTrue("Item 0 name is not 'shark' it is " + terms.getName(0), terms.getName(0).equals("shark"));
    assertTrue("Item 0 frequency is not '2'", (Integer) terms.getVal(0) == 2);

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    params.add(TermsParams.TERMS, "true");
    params.add(TermsParams.TERMS_FIELD, "lowerfilt");
    //no upper bound, lower bound doesn't exist
    params.add(TermsParams.TERMS_LOWER, "d");
    params.add(TermsParams.TERMS_LIMIT, String.valueOf(50));
    SolrRequestHandler handler;
    SolrQueryResponse rsp;
    NamedList values;
    NamedList terms;
    handler = core.getRequestHandler("/terms");
    assertTrue("handler is null and it shouldn't be", handler != null);
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    terms = (NamedList) ((NamedList) values.get("terms")).get("lowerfilt");
    assertTrue("terms Size: " + terms.size() + " is not: " + 0, terms.size() == 0);
  }

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    params.add(TermsParams.TERMS_LOWER_INCLUSIVE, "false");
    params.add(TermsParams.TERMS_FIELD, "lowerfilt");
    params.add(TermsParams.TERMS_LOWER, "a");
    params.add(TermsParams.TERMS_UPPER, "b");
    params.add(TermsParams.TERMS_LIMIT, String.valueOf(50));
    SolrRequestHandler handler;
    SolrQueryResponse rsp;
    NamedList values;
    NamedList terms;
    handler = core.getRequestHandler("/terms");
    assertTrue("handler is null and it shouldn't be", handler != null);
    
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    terms = (NamedList) ((NamedList) values.get("terms")).get("lowerfilt");
    assertTrue("terms Size: " + terms.size() + " is not: " + 5, terms.size() == 5);
    assertTrue("aa is null and it shouldn't be", terms.get("aa") != null);
    assertTrue("ab is null and it shouldn't be", terms.get("ab") != null);
    assertTrue("aaa is null and it shouldn't be", terms.get("aaa") != null);
    assertTrue("abb is null and it shouldn't be", terms.get("abb") != null);
    assertTrue("abc is null and it shouldn't be", terms.get("abc") != null);
    assertTrue("a is not null", terms.get("a") == null);
    assertTrue("baa is not null", terms.get("baa") == null);


    //test where the lower is not a term
    params = new ModifiableSolrParams();
    params.add(TermsParams.TERMS, "true");
    params.add(TermsParams.TERMS_LOWER_INCLUSIVE, "false");
    params.add(TermsParams.TERMS_FIELD, "standardfilt");
    params.add(TermsParams.TERMS_LOWER, "cc");
    params.add(TermsParams.TERMS_UPPER, "d");
    params.add(TermsParams.TERMS_LIMIT, String.valueOf(50));
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    terms = (NamedList) ((NamedList) values.get("terms")).get("standardfilt");
    assertTrue("terms Size: " + terms.size() + " is not: " + 2, terms.size() == 2);
  }

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    params.add(TermsParams.TERMS, "true");
    params.add(TermsParams.TERMS_FIELD, "lowerfilt");
    params.add(TermsParams.TERMS_LOWER, "a");
    params.add(TermsParams.TERMS_UPPER, "b");
    params.add(TermsParams.TERMS_LIMIT, String.valueOf(50));
    SolrRequestHandler handler;
    SolrQueryResponse rsp;
    NamedList values;
    NamedList terms;
    handler = core.getRequestHandler("/terms");
    assertTrue("handler is null and it shouldn't be", handler != null);
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    terms = (NamedList) ((NamedList) values.get("terms")).get("lowerfilt");
    assertTrue("terms Size: " + terms.size() + " is not: " + 6, terms.size() == 6);
    assertTrue("aa is null and it shouldn't be", terms.get("aa") != null);
    assertTrue("aaa is null and it shouldn't be", terms.get("aaa") != null);
    assertTrue("ab is null and it shouldn't be", terms.get("ab") != null);
    assertTrue("abb is null and it shouldn't be", terms.get("abb") != null);
    assertTrue("abc is null and it shouldn't be", terms.get("abc") != null);
    assertTrue("a is null", terms.get("a") != null);
    assertTrue("b is not null and it should be", terms.get("b") == null);


    params.add(TermsParams.TERMS_UPPER_INCLUSIVE, "true");
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    terms = (NamedList) ((NamedList) values.get("terms")).get("lowerfilt");
    assertTrue("terms Size: " + terms.size() + " is not: " + 7, terms.size() == 7);
    assertTrue("aa is null and it shouldn't be", terms.get("aa") != null);
    assertTrue("ab is null and it shouldn't be", terms.get("ab") != null);
    assertTrue("aaa is null and it shouldn't be", terms.get("aaa") != null);
    assertTrue("abb is null and it shouldn't be", terms.get("abb") != null);
    assertTrue("abc is null and it shouldn't be", terms.get("abc") != null);
    assertTrue("b is null and it shouldn't be", terms.get("b") != null);
    assertTrue("a is null", terms.get("a") != null);
    assertTrue("baa is not null", terms.get("baa") == null);


    params = new ModifiableSolrParams();
    params.add(TermsParams.TERMS, "true");
    params.add(TermsParams.TERMS_FIELD, "lowerfilt");
    params.add(TermsParams.TERMS_LOWER, "a");
    params.add(TermsParams.TERMS_UPPER, "b");
    params.add(TermsParams.TERMS_RAW, "true");  // this should have no effect on a text field
    params.add(TermsParams.TERMS_LIMIT, String.valueOf(2));
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    terms = (NamedList) ((NamedList) values.get("terms")).get("lowerfilt");
    assertTrue("terms Size: " + terms.size() + " is not: " + 2, terms.size() == 2);
    assertTrue("aa is null and it shouldn't be", terms.get("a") != null);
    assertTrue("aaa is null and it shouldn't be", terms.get("aa") != null);
    assertTrue("abb is not null", terms.get("abb") == null);
    assertTrue("abc is not null", terms.get("abc") == null);
    assertTrue("b is null and it shouldn't be", terms.get("b") == null);
    assertTrue("baa is not null", terms.get("baa") == null);


    params = new ModifiableSolrParams();
    params.add(TermsParams.TERMS, "true");
    params.add(TermsParams.TERMS_FIELD, "foo_i");
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    terms = (NamedList) ((NamedList) values.get("terms")).get("foo_i");
    assertEquals(2,terms.get("1"));


    params.add("terms.raw","true");
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    terms = (NamedList) ((NamedList) values.get("terms")).get("foo_i");
    assertTrue(terms.get("1") == null);


    // check something at the end of the index
    params.set(TermsParams.TERMS_FIELD, "zzz_i");
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    terms = (NamedList) ((NamedList) values.get("terms")).get("zzz_i");
    assertTrue(terms.size() == 0);


  }

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  public void testMinMaxFreq() throws Exception {
    SolrCore core = h.getCore();
    TermsComponent tc = (TermsComponent) core.getSearchComponent("termsComp");
    assertTrue("tc is null and it shouldn't be", tc != null);
    SolrRequestHandler handler;
    SolrQueryResponse rsp;
    NamedList values;
    NamedList terms;
    handler = core.getRequestHandler("/terms");
    ModifiableSolrParams params = new ModifiableSolrParams();
    params.add(TermsParams.TERMS, "true");
    params.add(TermsParams.TERMS_FIELD, "lowerfilt");
    params.add(TermsParams.TERMS_LIMIT, String.valueOf(50));
    // Tests TERMS_LOWER = "a" with freqmin = 2, freqmax = -1, terms.size() = 1
    params.add(TermsParams.TERMS_LOWER, "a");
    params.add(TermsParams.TERMS_MINCOUNT,String.valueOf(2));
    params.add(TermsParams.TERMS_MAXCOUNT,String.valueOf(TermsComponent.UNLIMITED_MAX_COUNT));
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    terms = (NamedList) ((NamedList) values.get("terms")).get("lowerfilt");
    assertTrue("terms Size: " + terms.size() + " is not: " + 1, terms.size() == 1);


    params = new ModifiableSolrParams();
    params.add(TermsParams.TERMS, "true");
    params.add(TermsParams.TERMS_FIELD, "standardfilt");
    params.add(TermsParams.TERMS_LIMIT, String.valueOf(50));
    // Tests TERMS_LOWER = "a" with freqmin = 2, freqmax = -1, terms.size() = 1
    params.add(TermsParams.TERMS_LOWER, "d");
    params.add(TermsParams.TERMS_MINCOUNT,String.valueOf(2));
    params.add(TermsParams.TERMS_MAXCOUNT,String.valueOf(3));
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    terms = (NamedList) ((NamedList) values.get("terms")).get("standardfilt");
    assertTrue("terms Size: " + terms.size() + " is not: " + 3, terms.size() == 3);
    Integer d = (Integer) terms.get("d");
    assertTrue(d + " does not equal: " + 3, d == 3);

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    params.add(SpellCheckComponent.SPELLCHECK_BUILD, "true");
    params.add(CommonParams.Q, "bluo");
    params.add(SpellCheckComponent.COMPONENT_NAME, "true");
    params.add(SpellCheckComponent.SPELLCHECK_COUNT, String.valueOf(5));
    params.add(SpellCheckComponent.SPELLCHECK_EXTENDED_RESULTS, String.valueOf(false));
    SolrRequestHandler handler = core.getRequestHandler("spellCheckCompRH");
    SolrQueryResponse rsp;
    rsp = new SolrQueryResponse();
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    NamedList values = rsp.getValues();
    String cmdExec = (String) values.get("command");
    assertEquals("build",cmdExec);
    NamedList spellCheck = (NamedList) values.get("spellcheck");
    NamedList suggestions = (NamedList) spellCheck.get("suggestions");
    NamedList blue = (NamedList) suggestions.get("bluo");
    assertEquals(5,blue.get("numFound"));
    Collection<String> theSuggestion = (Collection<String>) blue.get("suggestion");
    assertEquals(5,theSuggestion.size());
    //we know there are at least 5, but now only get 3


    params.remove(SpellCheckComponent.SPELLCHECK_COUNT);
    params.remove(SpellCheckComponent.SPELLCHECK_EXTENDED_RESULTS);
    params.remove(SpellCheckComponent.SPELLCHECK_BUILD);
    params.add(SpellCheckComponent.SPELLCHECK_COUNT, "3");
    params.add(SpellCheckComponent.SPELLCHECK_EXTENDED_RESULTS, String.valueOf(true));
    params.add(SpellCheckComponent.SPELLCHECK_BUILD, "false");
    rsp = new SolrQueryResponse();
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();


    spellCheck = (NamedList) values.get("spellcheck");
    suggestions = (NamedList) spellCheck.get("suggestions");
    blue = (NamedList) suggestions.get("bluo");

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    params.add(CommonParams.QT, "spellCheckCompRH");
    params.add(SpellCheckComponent.SPELLCHECK_BUILD, "true");
    params.add(CommonParams.Q, "documemt");
    params.add(SpellCheckComponent.COMPONENT_NAME, "true");


    SolrRequestHandler handler = core.getRequestHandler("spellCheckCompRH");
    SolrQueryResponse rsp = new SolrQueryResponse();
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    NamedList values = rsp.getValues();
    String cmdExec = (String) values.get("command");
    assertTrue("command is null and it shouldn't be", cmdExec != null);
    assertTrue(cmdExec + " is not equal to " + "build",
            cmdExec.equals("build") == true);

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    params.add(SpellCheckComponent.SPELLCHECK_BUILD, "true");
    params.add(CommonParams.Q, "documemt");
    params.add(SpellCheckComponent.COMPONENT_NAME, "true");
    params.add(SpellCheckComponent.SPELLCHECK_COLLATE, "true");


    SolrRequestHandler handler = core.getRequestHandler("spellCheckCompRH");
    SolrQueryResponse rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    NamedList values = rsp.getValues();
    NamedList spellCheck = (NamedList) values.get("spellcheck");
    NamedList suggestions = (NamedList) spellCheck.get("suggestions");
    String collation = (String) suggestions.get("collation");
    assertEquals("document", collation);
    params.remove(CommonParams.Q);
    params.add(CommonParams.Q, "documemt lowerfilt:broen^4");
    handler = core.getRequestHandler("spellCheckCompRH");
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    spellCheck = (NamedList) values.get("spellcheck");
    suggestions = (NamedList) spellCheck.get("suggestions");
    collation = (String) suggestions.get("collation");
    assertEquals("document lowerfilt:brown^4", collation);


    params.remove(CommonParams.Q);
    params.add(CommonParams.Q, "documemtsss broens");
    handler = core.getRequestHandler("spellCheckCompRH");
    rsp = new SolrQueryResponse();
    rsp.add("responseHeader", new SimpleOrderedMap());
    handler.handleRequest(new LocalSolrQueryRequest(core, params), rsp);
    values = rsp.getValues();
    spellCheck = (NamedList) values.get("spellcheck");
    suggestions = (NamedList) spellCheck.get("suggestions");
    collation = (String) suggestions.get("collation");
    assertEquals("document brown",collation);

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