Github user DT-Priyanka commented on a diff in the pull request:
https://github.com/apache/incubator-apex-malhar/pull/192#discussion_r53740308
--- Diff:
library/src/main/java/com/datatorrent/lib/db/jdbc/JDBCDimensionalOutputOperator.java
---
@@ -0,0 +1,462 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package com.datatorrent.lib.db.jdbc;
+
+
+import java.sql.PreparedStatement;
+import java.sql.SQLException;
+
+import java.util.List;
+import java.util.Map;
+
+import javax.validation.constraints.Min;
+import javax.validation.constraints.NotNull;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+
+import com.datatorrent.api.Context;
+
+import com.datatorrent.lib.appdata.gpo.GPOMutable;
+import com.datatorrent.lib.appdata.schemas.DimensionalConfigurationSchema;
+import com.datatorrent.lib.appdata.schemas.FieldsDescriptor;
+import com.datatorrent.lib.appdata.schemas.Type;
+import
com.datatorrent.lib.db.AbstractPassThruTransactionableStoreOutputOperator;
+import com.datatorrent.lib.dimensions.DimensionsDescriptor;
+import com.datatorrent.lib.dimensions.DimensionsEvent.Aggregate;
+import com.datatorrent.lib.dimensions.DimensionsEvent.EventKey;
+import com.datatorrent.lib.dimensions.aggregator.AggregatorRegistry;
+
+import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
+
+/**
+ * This operator writes updates emitted by a {@link DimensionsStoreHDHT}
+ * operator to a Mysql database. Updates are written to the database in the
+ * following fashion: <br/>
+ * <br/>
+ * <ol>
+ * <li>Aggregates are received from an upstream
+ * {@link AbstractDimensionsComputationFlexibleSingleSchema} operator.</li>
+ * <li>Each aggregate is written to a different table based on its
dimension
+ * combination, time bucket, and corresponding aggregation</li>
+ * </ol>
+ */
+public class JDBCDimensionalOutputOperator
+ extends AbstractPassThruTransactionableStoreOutputOperator<Aggregate,
JdbcTransactionalStore>
+{
+ protected static int DEFAULT_BATCH_SIZE = 1000;
+
+ @Min(1)
+ private int batchSize;
+ private final List<Aggregate> tuples;
+
+ private transient int batchStartIdx;
+
+ @NotNull
+ private Map<Integer, Map<String, String>> tableNames;
+ @NotNull
+ private String eventSchema;
+ @NotNull
+ private AggregatorRegistry aggregatorRegistry =
AggregatorRegistry.DEFAULT_AGGREGATOR_REGISTRY;
+ private DimensionalConfigurationSchema schema;
+
+ private transient Map<Integer, Map<Integer, PreparedStatement>>
ddIDToAggIDToStatement = Maps.newHashMap();
+
+ public JDBCDimensionalOutputOperator()
+ {
+ tuples = Lists.newArrayList();
+ batchSize = DEFAULT_BATCH_SIZE;
+ batchStartIdx = 0;
+ store = new JdbcTransactionalStore();
+ }
+
+ @Override
+ public void setup(Context.OperatorContext context)
+ {
+ super.setup(context);
+
+ LOG.info("Done setting up super");
+ aggregatorRegistry.setup();
+
+ //Create prepared statements
+ schema = new DimensionalConfigurationSchema(eventSchema,
aggregatorRegistry);
+
+ List<FieldsDescriptor> keyFDs =
schema.getDimensionsDescriptorIDToKeyDescriptor();
+
+ for (int ddID = 0; ddID < keyFDs.size(); ddID++) {
+
+ LOG.info("ddID {}", ddID);
+ FieldsDescriptor keyFD = keyFDs.get(ddID);
+ Int2ObjectMap<FieldsDescriptor> aggIDToAggFD = schema
+
.getDimensionsDescriptorIDToAggregatorIDToOutputAggregatorDescriptor().get(ddID);
+
+ Map<Integer, PreparedStatement> aggIDToStatement =
ddIDToAggIDToStatement.get(ddID);
+
+ if (aggIDToStatement == null) {
+ aggIDToStatement = Maps.newHashMap();
+ ddIDToAggIDToStatement.put(ddID, aggIDToStatement);
+ }
+
+ for (Map.Entry<String, String> aggTable :
tableNames.get(ddID).entrySet()) {
+ int aggID =
aggregatorRegistry.getIncrementalAggregatorNameToID().get(aggTable.getKey());
+
+ LOG.info("aggID {}", aggID);
+ FieldsDescriptor aggFD = aggIDToAggFD.get(aggID);
+
+ List<String> keyNames = keyFD.getFieldList();
+ keyNames.remove(DimensionsDescriptor.DIMENSION_TIME_BUCKET);
+
+ LOG.info("List fields {}", keyNames);
+ List<String> aggregateNames = aggFD.getFieldList();
+ LOG.info("List fields {}", aggregateNames);
+ String tableName = aggTable.getValue();
+
+ String statementString = buildStatement(tableName, keyNames,
aggregateNames);
+
+ try {
+ aggIDToStatement.put(aggID,
store.getConnection().prepareStatement(statementString));
+ } catch (SQLException ex) {
+ throw new RuntimeException(ex);
+ }
+ }
+ }
+ }
+
+ private String buildStatement(String tableName, List<String> keyNames,
List<String> aggregateNames)
+ {
+ LOG.info("building statement");
+ StringBuilder sb = new StringBuilder();
+ sb.append("INSERT INTO ");
+ sb.append(tableName);
+ sb.append(" (");
+
+ addList(sb, keyNames);
+ sb.append(",");
+ addList(sb, aggregateNames);
+
+ sb.append(") VALUES (");
+
+ for (int qCounter = 0;; qCounter++) {
+ sb.append("?");
+
+ if (qCounter == keyNames.size() + aggregateNames.size() - 1) {
+ break;
+ }
+
+ sb.append(",");
+ }
+
+ sb.append(") ON DUPLICATE KEY UPDATE ");
+
+ addOnDuplicate(sb, aggregateNames);
+
+ return sb.toString();
+ }
+
+ private void addOnDuplicate(StringBuilder sb, List<String> names)
+ {
+ LOG.info("add Duplicate");
+ for (int index = 0;; index++) {
+
+ String name = names.get(index);
+ sb.append(name);
+ sb.append("=");
+ sb.append("VALUES(");
+ sb.append(name);
+ sb.append(")");
+
+ if (index == names.size() - 1) {
+ break;
+ }
+
+ sb.append(",");
+ }
+ }
+
+ private void addList(StringBuilder sb, List<String> names)
+ {
+ for (int index = 0;; index++) {
+ sb.append(names.get(index));
+
+ if (index == names.size() - 1) {
+ break;
+ }
+
+ sb.append(",");
+ }
+ }
+
+ /**
+ * This sets the table names that corresponds to the dimensions
combinations
+ * specified in your {@link DimensionalConfigurationSchema}. The
structure of
+ * this property is as follows: <br/>
+ * <br/>
+ * <ol>
+ * <li>The first key is the dimension combination id assigned to a
dimension
+ * combination in your {@link DimensionalConfigurationSchema}. <br/>
+ * <br/>
+ * The dimensions descriptor id is determined by the following factors:
+ * <ul>
+ * <li>The dimensions combination specified in the
+ * {@link DimensionalConfigurationSchema}.</li>
+ * <li>The the Time Buckets defined in your
+ * {@link DimensionalConfigurationSchema}.</li>
+ * </ul>
+ * The dimensions descriptor id is computed in the following way:
+ * <ol>
+ * <li>The first dimensions descriptor id is 0</li>
+ * <li>A dimension combination is selected</li>
+ * <li>A time bucket is selected</li>
+ * <li>The current dimension combination and time bucket pair is
assigned a
+ * dimensions descriptor id</li>
+ * <li>The current dimensions descriptor id is incremented</li>
+ * <li>Steps 3 - 5 are repeated until all the time buckets are done</li>
+ * <li>Steps 2 - 6 are repeated until all the dimension combinations are
done.
+ * </li>
+ * </ol>
+ * <br/>
+ * <</li>
+ * <li>The second key is the name of an aggregation being performed for
that
+ * dimensions combination.</li>
+ * <li>The value is the name of the output Mysql table</li>
+ * </ol>
+ *
+ * @param tableNames
+ * The table names that corresponds to the dimensions
combinations
+ * specified in your {@link DimensionalConfigurationSchema}.
+ */
+ public void setTableNames(Map<Integer, Map<String, String>> tableNames)
+ {
+ this.tableNames = Preconditions.checkNotNull(tableNames);
+ }
+
+ /**
+ * Sets the JSON corresponding to the {@link
DimensionalConfigurationSchema}
+ * which was set on the upstream {@link
AppDataSingleSchemaDimensionStoreHDHT}
+ * and {@link AbstractDimensionsComputationFlexibleSingleSchema}
operators.
+ *
+ * @param eventSchema
+ * The JSON corresponding to the
+ * {@link DimensionalConfigurationSchema} which was set on the
+ * upstream {@link AppDataSingleSchemaDimensionStoreHDHT} and
+ * {@link AbstractDimensionsComputationFlexibleSingleSchema}
+ * operators.
+ */
+ public void setEventSchema(String eventSchema)
+ {
+ this.eventSchema = eventSchema;
+ }
+
+ /**
+ * Sets the {@link AggregatorRegistry} that is used to determine what
+ * aggregators correspond to what ids.
+ *
+ * @param aggregatorRegistry
+ * The {@link AggregatorRegistry} that is used to determine what
+ * aggregators correspond to what ids.
+ */
+ public void setAggregatorRegistry(AggregatorRegistry aggregatorRegistry)
+ {
+ this.aggregatorRegistry = aggregatorRegistry;
+ }
+
+ @Override
+ public void endWindow()
+ {
+ //Process any remaining tuples.
+ if (tuples.size() - batchStartIdx > 0) {
+ processBatch();
+ }
+ super.endWindow();
+ tuples.clear();
+ batchStartIdx = 0;
+ }
+
+ @Override
+ public void processTuple(Aggregate tuple)
+ {
+ tuples.add(tuple);
+ if ((tuples.size() - batchStartIdx) >= batchSize) {
+ processBatch();
+ }
+ }
+
+ /**
+ * Processes all the tuples in the batch once the batch size for the
operator
+ * is reached.
+ */
+ private void processBatch()
+ {
+ LOG.info("start {} end {}", batchStartIdx, tuples.size());
+ try {
+ for (int i = batchStartIdx; i < tuples.size(); i++) {
+ setStatementParameters(tuples.get(i));
+ }
+
+ for (Map.Entry<Integer, Map<Integer, PreparedStatement>>
ddIDToAggIDToStatementEntry : ddIDToAggIDToStatement
+ .entrySet()) {
+ for (Map.Entry<Integer, PreparedStatement> entry :
ddIDToAggIDToStatementEntry.getValue().entrySet()) {
+ entry.getValue().executeBatch();
+ entry.getValue().clearBatch();
+ }
+ }
+ } catch (SQLException e) {
+ throw new RuntimeException("processing batch", e);
+ } finally {
+ batchStartIdx += tuples.size() - batchStartIdx;
+ }
+ }
+
+ /**
+ * Sets the parameters on the {@link java.sql.PreparedStatement} based
on the
+ * values in the given {@link Aggregate}.
+ *
+ * @param aggregate
+ * The {@link Aggregate} whose values will be set on the
+ * corresponding {@link java.sql.PreparedStatement}.
+ */
+ private void setStatementParameters(Aggregate aggregate)
+ {
+ EventKey eventKey = aggregate.getEventKey();
+
+ int ddID = eventKey.getDimensionDescriptorID();
+ int aggID = eventKey.getAggregatorID();
+
+ LOG.info("Setting statement params {} {}", ddID, aggID);
+
+ FieldsDescriptor keyFD =
schema.getDimensionsDescriptorIDToKeyDescriptor().get(ddID);
+ FieldsDescriptor aggFD =
schema.getDimensionsDescriptorIDToAggregatorIDToOutputAggregatorDescriptor().get(ddID)
+ .get(aggID);
+
+ GPOMutable key = eventKey.getKey();
+ key.setFieldDescriptor(keyFD);
+
+ GPOMutable value = aggregate.getAggregates();
+ value.setFieldDescriptor(aggFD);
+
+ int qCounter = 1;
+
+ PreparedStatement ps = ddIDToAggIDToStatement.get(ddID).get(aggID);
+
+ try {
+ qCounter = setParams(ps, key, qCounter, true);
+ setParams(ps, value, qCounter, false);
+ ps.addBatch();
+ } catch (SQLException ex) {
+ throw new RuntimeException(ex);
+ }
+ }
+
+ /**
+ * @param ps
+ * The {@link java.sql.PreparedStatement} which will do an
insert
+ * into the Mysql database.
+ * @param gpo
+ * The {@link GPOMutable} object whose values need to be set in
the
+ * preparted statement.
+ * @param qCounter
+ * The current index in the prepared statement
+ * @param isKey
+ * TODO use this
+ * @return The current index in the prepared statement.
+ * @throws SQLException
+ */
+ private int setParams(PreparedStatement ps, GPOMutable gpo, int
qCounter, boolean isKey) throws SQLException
+ {
+ FieldsDescriptor fd = gpo.getFieldDescriptor();
+
+ Map<String, Type> fieldToType = fd.getFieldToType();
+ List<String> fields = fd.getFieldList();
+
+ for (int fieldCounter = 0; fieldCounter < fields.size();
fieldCounter++, qCounter++) {
+ String fieldName = fields.get(fieldCounter);
+
+ if (fieldName.equals(DimensionsDescriptor.DIMENSION_TIME_BUCKET)) {
+ qCounter--;
+ continue;
+ }
+
+ Type type = fieldToType.get(fieldName);
+
+ LOG.info("Field Name {} {}", fieldName, qCounter);
+
+ switch (type) {
+ case BOOLEAN: {
+ ps.setByte(qCounter, (byte)(gpo.getFieldBool(fieldName) ? 1 :
0));
+ break;
+ }
+ case BYTE: {
+ ps.setByte(qCounter, gpo.getFieldByte(fieldName));
+ break;
+ }
+ case CHAR: {
+ ps.setString(qCounter,
Character.toString(gpo.getFieldChar(fieldName)));
+ break;
+ }
+ case STRING: {
+ ps.setString(qCounter, gpo.getFieldString(fieldName));
+ break;
+ }
+ case SHORT: {
+ ps.setInt(qCounter, gpo.getFieldShort(fieldName));
+ break;
+ }
+ case INTEGER: {
+ ps.setInt(qCounter, gpo.getFieldInt(fieldName));
+ break;
+ }
+ case LONG: {
+ ps.setLong(qCounter, gpo.getFieldLong(fieldName));
+ break;
+ }
+ case FLOAT: {
+ ps.setFloat(qCounter, gpo.getFieldFloat(fieldName));
+ break;
+ }
+ case DOUBLE: {
+ ps.setDouble(qCounter, gpo.getFieldDouble(fieldName));
+ break;
+ }
+ default: {
+ throw new UnsupportedOperationException("The type: " + type + "
is not supported.");
+ }
+ }
+ }
+
+ return qCounter;
+ }
+
+ /**
+ * Sets the size of a batch operation.<br/>
+ * <b>Default:</b> {@value #DEFAULT_BATCH_SIZE}
+ *
+ * @param batchSize
+ * size of a batch
+ */
+ public void setBatchSize(int batchSize)
+ {
+ this.batchSize = batchSize;
+ }
+
+ private static final Logger LOG =
LoggerFactory.getLogger(AbstractJdbcTransactionableOutputOperator.class);
--- End diff --
The class name should be "JDBCDimensionalOutputOperator" to get log
messages with right class name.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
