lwn3148 commented on code in PR #135:
URL:
https://github.com/apache/flink-connector-elasticsearch/pull/135#discussion_r2779633141
##########
flink-connector-elasticsearch8/src/main/java/org/apache/flink/connector/elasticsearch/table/IndexGeneratorFactory.java:
##########
@@ -0,0 +1,298 @@
+package org.apache.flink.connector.elasticsearch.table;
+
+import org.apache.flink.annotation.Internal;
+import org.apache.flink.table.api.TableException;
+import org.apache.flink.table.data.RowData;
+import org.apache.flink.table.data.TimestampData;
+import org.apache.flink.table.types.DataType;
+import org.apache.flink.table.types.logical.LogicalType;
+import org.apache.flink.table.types.logical.LogicalTypeRoot;
+
+import javax.annotation.Nonnull;
+
+import java.io.Serializable;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Factory of {@link IndexGenerator}.
+ *
+ * <p>Flink supports both static index and dynamic index.
+ *
+ * <p>If you want to have a static index, this option value should be a plain
string, e.g.
+ * 'myusers', all the records will be consistently written into "myusers"
index.
+ *
+ * <p>If you want to have a dynamic index, you can use '{field_name}' to
reference a field value in
+ * the record to dynamically generate a target index. You can also use
+ * '{field_name|date_format_string}' to convert a field value of
TIMESTAMP/DATE/TIME type into the
+ * format specified by date_format_string. The date_format_string is
compatible with {@link
+ * java.text.SimpleDateFormat}. For example, if the option value is
'myusers_{log_ts|yyyy-MM-dd}',
+ * then a record with log_ts field value 2020-03-27 12:25:55 will be written
into
+ * "myusers_2020-03-27" index.
+ */
+@Internal
+final class IndexGeneratorFactory {
+
+ private IndexGeneratorFactory() {}
+
+ public static IndexGenerator createIndexGenerator(
+ String index,
+ List<String> fieldNames,
+ List<DataType> dataTypes,
+ ZoneId localTimeZoneId) {
+ final IndexHelper indexHelper = new IndexHelper();
+ if (indexHelper.checkIsDynamicIndex(index)) {
+ return createRuntimeIndexGenerator(
+ index,
+ fieldNames.toArray(new String[0]),
+ dataTypes.toArray(new DataType[0]),
+ indexHelper,
+ localTimeZoneId);
+ } else {
+ return new StaticIndexGenerator(index);
+ }
+ }
+
+ public static IndexGenerator createIndexGenerator(
+ String index, List<String> fieldNames, List<DataType> dataTypes) {
+ return createIndexGenerator(index, fieldNames, dataTypes,
ZoneId.systemDefault());
+ }
+
+ interface DynamicFormatter extends Serializable {
+ String format(@Nonnull Object fieldValue, DateTimeFormatter formatter);
+ }
+
+ private static IndexGenerator createRuntimeIndexGenerator(
+ String index,
+ String[] fieldNames,
+ DataType[] fieldTypes,
+ IndexHelper indexHelper,
+ ZoneId localTimeZoneId) {
+ final String dynamicIndexPatternStr =
indexHelper.extractDynamicIndexPatternStr(index);
+ final String indexPrefix = index.substring(0,
index.indexOf(dynamicIndexPatternStr));
+ final String indexSuffix =
+ index.substring(indexPrefix.length() +
dynamicIndexPatternStr.length());
+
+ if (indexHelper.checkIsDynamicIndexWithSystemTimeFormat(index)) {
+ final String dateTimeFormat =
+ indexHelper.extractDateFormat(
+ index,
LogicalTypeRoot.TIMESTAMP_WITH_LOCAL_TIME_ZONE);
+ return new AbstractTimeIndexGenerator(index, dateTimeFormat) {
+ @Override
+ public String generate(RowData row) {
+ return indexPrefix
+
.concat(LocalDateTime.now(localTimeZoneId).format(dateTimeFormatter))
+ .concat(indexSuffix);
+ }
+ };
+ }
+
+ final boolean isDynamicIndexWithFormat =
indexHelper.checkIsDynamicIndexWithFormat(index);
+ final int indexFieldPos =
+ indexHelper.extractIndexFieldPos(index, fieldNames,
isDynamicIndexWithFormat);
+ final LogicalType indexFieldType =
fieldTypes[indexFieldPos].getLogicalType();
+ final LogicalTypeRoot indexFieldLogicalTypeRoot =
indexFieldType.getTypeRoot();
+
+ // validate index field type
+ indexHelper.validateIndexFieldType(indexFieldLogicalTypeRoot);
+
+ // time extract dynamic index pattern
+ final RowData.FieldGetter fieldGetter =
+ RowData.createFieldGetter(indexFieldType, indexFieldPos);
+
+ if (isDynamicIndexWithFormat) {
+ final String dateTimeFormat =
+ indexHelper.extractDateFormat(index,
indexFieldLogicalTypeRoot);
+ DynamicFormatter formatFunction =
+ createFormatFunction(
+ indexFieldType, indexFieldLogicalTypeRoot,
localTimeZoneId);
+
+ return new AbstractTimeIndexGenerator(index, dateTimeFormat) {
+ @Override
+ public String generate(RowData row) {
+ Object fieldOrNull = fieldGetter.getFieldOrNull(row);
+ final String formattedField;
+ if (fieldOrNull != null) {
+ formattedField = formatFunction.format(fieldOrNull,
dateTimeFormatter);
+ } else {
+ formattedField = "null";
+ }
+ return
indexPrefix.concat(formattedField).concat(indexSuffix);
+ }
+ };
+ }
+ // general dynamic index pattern
+ return new IndexGeneratorBase(index) {
+ @Override
+ public String generate(RowData row) {
+ Object indexField = fieldGetter.getFieldOrNull(row);
+ return indexPrefix
+ .concat(indexField == null ? "null" :
indexField.toString())
+ .concat(indexSuffix);
+ }
+ };
+ }
+
+ private static DynamicFormatter createFormatFunction(
+ LogicalType indexFieldType,
+ LogicalTypeRoot indexFieldLogicalTypeRoot,
+ ZoneId localTimeZoneId) {
+ switch (indexFieldLogicalTypeRoot) {
+ case DATE:
+ return (value, dateTimeFormatter) -> {
+ Integer indexField = (Integer) value;
+ return
LocalDate.ofEpochDay(indexField).format(dateTimeFormatter);
+ };
+ case TIME_WITHOUT_TIME_ZONE:
+ return (value, dateTimeFormatter) -> {
+ Integer indexField = (Integer) value;
+ return LocalTime.ofNanoOfDay(indexField *
1_000_000L).format(dateTimeFormatter);
+ };
+ case TIMESTAMP_WITHOUT_TIME_ZONE:
+ return (value, dateTimeFormatter) -> {
+ TimestampData indexField = (TimestampData) value;
+ return
indexField.toLocalDateTime().format(dateTimeFormatter);
+ };
+ case TIMESTAMP_WITH_TIME_ZONE:
+ throw new UnsupportedOperationException(
+ "TIMESTAMP_WITH_TIME_ZONE is not supported yet");
+ case TIMESTAMP_WITH_LOCAL_TIME_ZONE:
+ return (value, dateTimeFormatter) -> {
+ TimestampData indexField = (TimestampData) value;
+ return
indexField.toInstant().atZone(localTimeZoneId).format(dateTimeFormatter);
+ };
+ default:
+ throw new TableException(
+ String.format(
+ "Unsupported type '%s' found in Elasticsearch
dynamic index field, "
+ + "time-related pattern only support
types are: DATE,TIME,TIMESTAMP.",
+ indexFieldType));
+ }
+ }
+
+ /**
+ * Helper class for {@link IndexGeneratorFactory}, this helper can use to
validate index field
+ * type ans parse index format from pattern.
+ */
+ static class IndexHelper {
+ private static final Pattern dynamicIndexPattern =
Pattern.compile("\\{[^\\{\\}]+\\}?");
+ private static final Pattern dynamicIndexTimeExtractPattern =
+ Pattern.compile(".*\\{.+\\|.*\\}.*");
+ private static final Pattern dynamicIndexSystemTimeExtractPattern =
+ Pattern.compile(
+
".*\\{\\s*(now\\(\\s*\\)|NOW\\(\\s*\\)|current_timestamp|CURRENT_TIMESTAMP)\\s*\\|.*\\}.*");
+ private static final List<LogicalTypeRoot> supportedTypes = new
ArrayList<>();
+ private static final Map<LogicalTypeRoot, String> defaultFormats = new
HashMap<>();
+
+ static {
+ // time related types
+ supportedTypes.add(LogicalTypeRoot.DATE);
+ supportedTypes.add(LogicalTypeRoot.TIME_WITHOUT_TIME_ZONE);
+ supportedTypes.add(LogicalTypeRoot.TIMESTAMP_WITHOUT_TIME_ZONE);
+ supportedTypes.add(LogicalTypeRoot.TIMESTAMP_WITH_TIME_ZONE);
Review Comment:
This functionality is not supported yet, it’s tracked in
[FLINK-20869](https://issues.apache.org/jira/browse/FLINK-20869). I’ll add a
`TODO` comment to make this explicit.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
