Examples of ch.agent.crnickl.api.UpdatableSchema

ch.agent.crnickl.api.UpdatableSchema
An UpdatableSchema is a schema which can be modified. A schema can only be modified if it is not in use or if the modification has no consequence on existing use. For example a series can always be added but can only be deleted if no chronicle using the schema has actually created the series.
Updatable schemas are not only used in client applications like schema editors but also by CrNiCKL internally. Any schema can be defined as an extension to another schema. Schemas are kept in permanent storage without resolving these extensions. Before a schema is made available for use, CrNiCKL resolves the extensions. Extensions are visible to clients only in edit mode.
A hypothetical example will help to illustrate how schemas are constructed. The example uses 3 schemas: a, b, and c. Schema a defines two series, s1 and s2, and one attribute, a1. Schema b extends schema a; it removes series s2, and adds series s3. Schema c extends schema b; it adds attribute a2 and redefines attribute a1 (for example with a different default value). Given this design, a chronicle with effective schema c, will have two series, s1 and s3, and two attributes, a1 and a2. It will not be aware of the existence of schemas a and b. @author Jean-Paul Vetterli @version 1.1.0

  public void test_20() {
    try {
      Chronicle chronicle = db.getChronicle(CHRONICLE, true);
      assertEquals(1, chronicle.getSchema(true).getSeriesDefinitions().size());
      Schema s0 = chronicle.getSchema(true);
      UpdatableSchema usch = s0.edit();
      usch.addSeries(4);
      usch.setSeriesName(4, "test4");
      usch.setSeriesType(4, "numeric");
      usch.setSeriesTimeDomain(4, Day.DOMAIN);
      assertEquals(2, usch.getSeriesDefinitions().size());
      usch.applyUpdates();
      assertEquals(2, usch.getSeriesDefinitions().size());
      db.commit();
      assertEquals(1, chronicle.getSchema(true).getSeriesDefinitions().size());
      chronicle = db.getChronicle(CHRONICLE, true);
      assertEquals(2, chronicle.getSchema(true).getSeriesDefinitions().size());
    } catch (Exception e) {

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  }


  private void listSchemas(String pattern) throws Exception {
    Collection<UpdatableSchema> schemas = db.getUpdatableSchemas(pattern);
    for (UpdatableSchema schema : schemas) {
      UpdatableSchema base = schema.getBase();
      if (base == null)
        System.out.println(schema.getName());
      else
        System.out.println(schema.getName() + "--->" + schema.getBase().getName());
    }

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    }
  }
  
  public void test_010_create_schema_failure_series_name_used_twice () {
    try {
      UpdatableSchema schema = db.createSchema("schema1", null);
      schema.addSeries(1);
      schema.setSeriesName(1, "x25");
      schema.addSeries(2);
      // name already used
      schema.setSeriesName(2, "x25");
      expectException();
    } catch (Exception e) {
      assertException(e, D.D30153);
    }
  }

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    }
  }
  
  public void test_020_create_schema_ok_but_not_applied() {
    try {
      UpdatableSchema schema = db.createSchema("schema1", null);
      schema.addSeries(1);
      schema.setSeriesName(1, "x25");
      schema.addAttribute(1);
      schema.setAttributeProperty(1, db.getProperty("prop1", true));
      schema.setAttributeDefault(1, "t1v1");
      assertEquals("t1v1", schema.getAttributeDefinition(1, true).getValue().toString());
      assertEquals("t1v1", schema.getAttributeDefinition("prop1", true).getValue().toString());
    } catch (Exception e) {
      fail(e.getMessage());
    }
  }

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      fail(e.getMessage());
    }
  }
  public void test_030_create_schema_failure_illegal_value_on_property_modification() {
    try {
      UpdatableSchema schema = db.createSchema("schema1", null);
      schema.addAttribute(1);
      schema.setAttributeProperty(1, db.getProperty("prop1", true));
      schema.setAttributeDefault(1, "t1v1");
      // next one makes default value illegal
      schema.setAttributeProperty(1, db.getProperty("prop2", true));
      schema.applyUpdates();
      expectException();
    } catch (Exception e) {
      assertException(e, D.D30133);
    }
  }

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  }


  public void test_040_create_schema_failure_incomplete_attribute() {
    try {
      // adding an incomplete, non-erasing attribute should fail
      UpdatableSchema schema = db.createSchema("schema1", null);
      schema.addAttribute(1);
      schema.applyUpdates();
      expectException();
    } catch (Exception e) {
      assertException(e, D.D30105, D.D30111);
    }
  }

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  }
  
  public void test_050_create_schema_failure_incomplete_attribute_no_value() {
    try {
      // attribute restricted, without "empty" value in the list
      UpdatableSchema schema = db.createSchema("schema1", null);
      schema.addAttribute(1);
      schema.setAttributeProperty(1, db.getProperty("prop1", true));
      schema.applyUpdates();
      expectException();
    } catch (Exception e) {
      assertException(e, D.D30105, D.D30111);
    }
  }

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  }
  
  public void test_060_create_schema_with_empty_value() {
    try {
      // attribute restricted, with "empty" value in the list
      UpdatableSchema schema = db.createSchema("schema2a", null);
      schema.addAttribute(1);
      Property<?> prop = db.getProperty("prop2", true);
      schema.setAttributeProperty(1, prop);
      schema.setAttributeDefault(1, prop.scan(""));
      schema.applyUpdates();
    } catch (Exception e) {
      fail(e.getMessage());
    }
  }

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  public void test_070_create_schema_with_null_value() {
    try {
      // attribute restricted, with "empty" value in the list
      // null string is not okay, use empty string
      UpdatableSchema schema = db.createSchema("schema2b", null);
      schema.addAttribute(1);
      schema.setAttributeProperty(1, db.getProperty("prop2", true));
      schema.applyUpdates();
      expectException();
    } catch (Exception e) {
      assertException(e, D.D30105, D.D30111);
    }
  }

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  }


  public void test_080_create_schema_failure_incomplete_series() {
    try {
      // adding an incomplete, non-erasing series should fail
      UpdatableSchema schema = db.createSchema("schema1", null);
      schema.addSeries(1);
      schema.applyUpdates();
      expectException();
    } catch (Exception e) {
      assertException(e, D.D30105, D.D30112);
    }
  }

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ch.agent.crnickl.impl.SchemaUpdatePolicyImpl

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ch.agent.crnickl.jdbc.ReadMethodsForSchema

ch.agent.crnickl.jdbc.WriteMethodsForSchema

ch.agent.crnickl.junit.T015_SchemaChronicleSeriesValueTest

ch.agent.crnickl.junit.T017_SchemaTest

ch.agent.crnickl.junit.T040_SeriesTest

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