Java Update类代码示例

import com.datastax.driver.core.querybuilder.Update; //导入依赖的package包/类
/**
 * Test with incoming message containing a header with RegularStatement.
 */
@Test
public void testRequestMessageStatement() throws Exception {
    Update.Where update = update("camel_user")
            .with(set("first_name", bindMarker()))
            .and(set("last_name", bindMarker()))
            .where(eq("login", bindMarker()));
    Object response = producerTemplate.requestBodyAndHeader(new Object[]{"Claus 2", "Ibsen 2", "c_ibsen"},
            CassandraConstants.CQL_QUERY, update);

    Cluster cluster = CassandraUnitUtils.cassandraCluster();
    Session session = cluster.connect(CassandraUnitUtils.KEYSPACE);
    ResultSet resultSet = session.execute("select login, first_name, last_name from camel_user where login = ?", "c_ibsen");
    Row row = resultSet.one();
    assertNotNull(row);
    assertEquals("Claus 2", row.getString("first_name"));
    assertEquals("Ibsen 2", row.getString("last_name"));
    session.close();
    cluster.close();
}
 

import com.datastax.driver.core.querybuilder.Update; //导入依赖的package包/类
/**
 * Test with incoming message containing a header with RegularStatement.
 */
@Test
public void testRequestMessageStatement() throws Exception {
    Update.Where update = update("camel_user")
            .with(set("first_name", "Claus 2"))
            .and(set("last_name", "Ibsen 2"))
            .where(eq("login", "c_ibsen"));
    Object response = producerTemplate.requestBodyAndHeader(null,
            CassandraConstants.CQL_QUERY, update);

    Cluster cluster = CassandraUnitUtils.cassandraCluster();
    Session session = cluster.connect(CassandraUnitUtils.KEYSPACE);
    ResultSet resultSet = session.execute("select login, first_name, last_name from camel_user where login = ?", "c_ibsen");
    Row row = resultSet.one();
    assertNotNull(row);
    assertEquals("Claus 2", row.getString("first_name"));
    assertEquals("Ibsen 2", row.getString("last_name"));
    session.close();
    cluster.close();
}
 

import com.datastax.driver.core.querybuilder.Update; //导入依赖的package包/类
@Test
public void testConditionalUpdates() throws Exception {
    Update initialStatement = update(KEYSPACE_NAME, TABLE_NAME);
    initialStatement.with(set(VALUE_NAME, 10)).where(eq(KEY_NAME, "DE"));
    this.executeAndAssert(initialStatement, "DE", 10);

    // Now let's conditionally update where it is true
    Update updateStatement = update(KEYSPACE_NAME, TABLE_NAME);
    updateStatement.with(set(VALUE_NAME, 15)).where(eq(KEY_NAME, "DE")).onlyIf(eq(VALUE_NAME, 10));
    this.executeAndAssert(updateStatement, "DE", 15);

    // Now let's conditionally update where it is false
    Update conditionalStatement = update(KEYSPACE_NAME, TABLE_NAME);
    conditionalStatement.with(set(VALUE_NAME, 20)).where(eq(KEY_NAME, "DE")).onlyIf(eq(VALUE_NAME, 10));
    this.executeAndAssert(conditionalStatement, "DE", 15);
}
 

import com.datastax.driver.core.querybuilder.Update; //导入依赖的package包/类
private void runBatchUpdate(List<Update> updateRequest) {
    try {
        Batch batch;

        if (config.getLoggedBatch()) {
            batch = QueryBuilder.batch(updateRequest
                    .toArray(new RegularStatement[updateRequest.size()]));
        } else {
            batch = QueryBuilder.unloggedBatch(updateRequest
                    .toArray(new RegularStatement[updateRequest.size()]));
        }
        totalCassandraUpdateRequest.addAndGet(updateRequest.size());
        ResultSetFuture future = cassandraSession.executeAsync(batch);
        CallBackListener listener = new CallBackListener(future, null);
        future.addListener(listener, pool);
        incrementBatchUpdateCounter();
        pendingRequestCounter.incrementAndGet();
    } catch (Throwable ex) {
        LOGGER.error("Error publising metrics in MetricCassandraCollector:" + ex.getMessage());
        cassandraErrorCount.increment();
        registerError(ex);
    } finally {
        updateRequest.clear();
    }
}
 

import com.datastax.driver.core.querybuilder.Update; //导入依赖的package包/类
@Override
public Optional<CassandraCredentials> updateStatus(String applicationId,
                                                   String credentialsId,
                                                   CredentialsStatus status) {
  LOG.debug("Updating credentials status with applicationID[{}] "
          + "and credentialsID[{}] to STATUS[{}]",
      applicationId, credentialsId, status.toString());
  Update.Assignments query = update(getColumnFamilyName())
      .where(eq(CREDENTIALS_ID_PROPERTY, credentialsId))
      .and(eq(CREDENTIALS_APPLICATION_ID_PROPERTY, applicationId))
      .with(set(CREDENTIALS_STATUS_PROPERTY, status.toString()));
  execute(query);
  return find(applicationId, credentialsId);
}
 

import com.datastax.driver.core.querybuilder.Update; //导入依赖的package包/类
/**
 * This method returns the CQL Query for UpdateByQuery method
 * refer : http://docs.datastax.com/en/cql/3.3/cql/cql_reference/cqlUpdate.html
 *
 * @param mapping        Cassandra mapping {@link CassandraMapping}
 * @param cassandraQuery Cassandra Query {@link CassandraQuery}
 * @param objects        field Objects list
 * @return CQL Query
 */
static String getUpdateByQueryForAvro(CassandraMapping mapping, Query cassandraQuery, List<Object> objects, Schema schema) {
  Update update = QueryBuilder.update(mapping.getKeySpace().getName(), mapping.getCoreName());
  Update.Assignments updateAssignments = null;
  if (cassandraQuery instanceof CassandraQuery) {
    String[] columnNames = getColumnNames(mapping, Arrays.asList(cassandraQuery.getFields()));
      for (String column : columnNames) {
        updateAssignments = update.with(QueryBuilder.set(column, "?"));
        Field field = mapping.getFieldFromColumnName(column);
        Object value = ((CassandraQuery) cassandraQuery).getUpdateFieldValue(field.getFieldName());
        try {
          Schema schemaField = schema.getField(field.getFieldName()).schema();
          objects.add(AvroCassandraUtils.getFieldValueFromAvroBean(schemaField, schemaField.getType(), value, field));
        } catch (NullPointerException e) {
          throw new RuntimeException(field + " field couldn't find in the class " + mapping.getPersistentClass() + ".");
        }
      }
  } else {
    throw new RuntimeException("Please use Cassandra Query object to invoke, UpdateByQuery method.");
  }
  return processQuery(cassandraQuery, updateAssignments, mapping, objects);
}
 

import com.datastax.driver.core.querybuilder.Update; //导入依赖的package包/类
private RegularStatement updateAnalyse(Identifier accountId, String analyseId, String name, String timezone,
                                       String ext) {
    Preconditions.checkNotNull(name, "Analyse name can't be null.");
    UUID uuid = UUID.fromString(analyseId);
    Update.Assignments query = updateTable(accountId, uuid).with(set("analyse_name", name));
    if (!Strings.isNullOrEmpty(timezone)) {
        query = query.and(set("timezone", timezone));
    }
    if (ext != null) {
        query = query.and(set("ext", ext));
    }
    return query;
}
 

import com.datastax.driver.core.querybuilder.Update; //导入依赖的package包/类
private RegularStatement updateCornerEvents(Identifier accId, String analyseId, String jvmId,
                                           DateTime firstEvent, DateTime lastEvent) {
    RegularStatement ule = updateTable(accId, analyseId)
            .with(put("last_event", jvmId, lastEvent.toDateTime(DateTimeZone.UTC).getMillis()));
    if (firstEvent != null) {
        Update.Where firstEventQuery = updateTable(accId, analyseId);
        firstEventQuery
                .with(put("first_event", jvmId, firstEvent.toDateTime(DateTimeZone.UTC).getMillis()));
        firstEventQuery.onlyIf(eq("first_event['" + jvmId + "']", null));
        connector.session().execute(firstEventQuery);
    }
    return ule;
}
 

import com.datastax.driver.core.querybuilder.Update; //导入依赖的package包/类
/**
 * Simulate different CQL statements in the incoming message containing a header with RegularStatement, justifying the cassandracql endpoint not containing a "cql" Uri parameter
 */
@Test
public void testEndpointNoCqlParameter() throws Exception {
    Update.Where updateFirstName = update("camel_user")
            .with(set("first_name", bindMarker()))
            .where(eq("login", bindMarker()));
    @SuppressWarnings("unused")
    Object response1 = producerTemplateNoEndpointCql.requestBodyAndHeader(new Object[]{"Claus 2", "c_ibsen"},
            CassandraConstants.CQL_QUERY, updateFirstName);

    Cluster cluster = CassandraUnitUtils.cassandraCluster();
    Session session = cluster.connect(CassandraUnitUtils.KEYSPACE);
    ResultSet resultSet1 = session.execute("select login, first_name, last_name from camel_user where login = ?", "c_ibsen");
    Row row1 = resultSet1.one();
    assertNotNull(row1);
    assertEquals("Claus 2", row1.getString("first_name"));
    assertEquals("Ibsen", row1.getString("last_name"));

    Update.Where updateLastName = update("camel_user")
            .with(set("last_name", bindMarker()))
            .where(eq("login", bindMarker()));
    @SuppressWarnings("unused")
    Object response2 = producerTemplateNoEndpointCql.requestBodyAndHeader(new Object[]{"Ibsen 2", "c_ibsen"},
            CassandraConstants.CQL_QUERY, updateLastName);

    ResultSet resultSet2 = session.execute("select login, first_name, last_name from camel_user where login = ?", "c_ibsen");
    Row row2 = resultSet2.one();
    assertNotNull(row2);
    assertEquals("Claus 2", row2.getString("first_name"));
    assertEquals("Ibsen 2", row2.getString("last_name"));

    session.close();
    cluster.close();
}
 

import com.datastax.driver.core.querybuilder.Update; //导入依赖的package包/类
@Override
public void incrementEvent(long playerId, String event, long count) {
    Update updateStatement = QueryBuilder.update("player_event_counts");
    updateStatement.where(QueryBuilder.eq("player_id", playerId)).and(QueryBuilder.eq("event", event));
    updateStatement.with(QueryBuilder.incr("counter_value", count));
    session.execute(updateStatement);
}
 

import com.datastax.driver.core.querybuilder.Update; //导入依赖的package包/类
@Override
public String generateAccessToken(String externalId, String tenantId) {
  LOG.debug("Generating access token for endpoint user with external id {} and tenant id {}",
      externalId, tenantId);
  String accessToken = UUID.randomUUID().toString();
  Update.Where query = update(getColumnFamilyName())
      .with(set(CassandraModelConstants.EP_USER_ACCESS_TOKEN_PROPERTY, accessToken))
      .where(eq(EP_USER_EXTERNAL_ID_PROPERTY, externalId))
      .and(eq(EP_USER_TENANT_ID_PROPERTY, tenantId));
  execute(query);
  LOG.trace("Generated access token {} for endpoint user by query {}", accessToken, query);
  return accessToken;
}
 

import com.datastax.driver.core.querybuilder.Update; //导入依赖的package包/类
/**
 * This method returns the CQL Query for UpdateByQuery method
 * refer : http://docs.datastax.com/en/cql/3.3/cql/cql_reference/cqlUpdate.html
 *
 * @param mapping        Cassandra mapping {@link CassandraMapping}
 * @param cassandraQuery Cassandra Query {@link CassandraQuery}
 * @param objects        field Objects list
 * @return CQL Query
 */
static String getUpdateByQueryForNative(CassandraMapping mapping, Query cassandraQuery, List<Object> objects) {
  Update update = QueryBuilder.update(mapping.getKeySpace().getName(), mapping.getCoreName());
  Update.Assignments updateAssignments = null;
  if (cassandraQuery instanceof CassandraQuery) {
    String[] columnNames = getColumnNames(mapping, Arrays.asList(cassandraQuery.getFields()));
      for (String column : columnNames) {
        updateAssignments = update.with(QueryBuilder.set(column, "?"));
        objects.add(((CassandraQuery) cassandraQuery).getUpdateFieldValue(mapping.getFieldFromColumnName(column).getFieldName()));
      }
  } else {
    throw new RuntimeException("Please use Cassandra Query object to invoke, UpdateByQuery method.");
  }
  return processQuery(cassandraQuery, updateAssignments, mapping, objects);
}
 

import com.datastax.driver.core.querybuilder.Update; //导入依赖的package包/类
private Collection<RegularStatement> diffMap(String table, String column, Clause whereClause, Map<?, ?> past,
        Map<?, ?> present) {

    List<RegularStatement> queries = Lists.newArrayList();

    Set<?> removed = Sets.newHashSet(past.keySet());
    removed.removeAll(present.keySet());

    if (!removed.isEmpty()) {
        Delete.Selection delete = QueryBuilder.delete();

        for (Object o : removed) {
            delete.mapElt(column, o);
        }

        queries.add(delete.from(table).where(whereClause));
    }

    Set<Entry<?, ?>> changed = Sets.<Entry<?, ?>> newHashSet(present.entrySet());
    changed.removeAll(past.entrySet());

    if (!changed.isEmpty()) {
        Update update = QueryBuilder.update(table);

        for (Entry<?, ?> entry : changed) {
            update.with(QueryBuilder.put(column, entry.getKey(), entry.getValue()));
        }

        queries.add(update.where(whereClause));
    }

    return queries;
}
 

import com.datastax.driver.core.querybuilder.Update; //导入依赖的package包/类
private Update.Where updateTable(Identifier accId, String uuid) {
    return updateTable(accId, UUID.fromString(uuid));
}
 

import com.datastax.driver.core.querybuilder.Update; //导入依赖的package包/类
public Statement map(TridentTuple tuple) {
    long t = System.currentTimeMillis() % 10;
    Update statement = update("mykeyspace", "mytable");
    statement.with(set("col1", tuple.getString(0))).where(eq("t", t));
    return statement;
}