woutifier-t commented on a change in pull request #3977: NIFI-7007 Add update
functionality to the PutCassandraRecord processor.
URL: https://github.com/apache/nifi/pull/3977#discussion_r383319786
##########
File path:
nifi-nar-bundles/nifi-cassandra-bundle/nifi-cassandra-processors/src/main/java/org/apache/nifi/processors/cassandra/PutCassandraRecord.java
##########
@@ -193,6 +319,106 @@ public void onTrigger(ProcessContext context,
ProcessSession session) throws Pro
}
+ protected Statement generateUpdate(String cassandraTable, RecordSchema
schema, String updateKeys, String updateMethod, Map<String, Object>
recordContentMap) {
+ Update updateQuery;
+
+ // Split up the update key names separated by a comma, should not be
empty
+ final Set<String> updateKeyNames;
+ updateKeyNames = Arrays.stream(updateKeys.split(","))
+ .map(String::trim)
+ .filter(StringUtils::isNotEmpty)
+ .collect(Collectors.toSet());
+ if (updateKeyNames.isEmpty()) {
+ throw new IllegalArgumentException("No Update Keys were
specified");
+ }
+
+ // Verify if all update keys are present in the record
+ for (String updateKey : updateKeyNames) {
+ if (!schema.getFieldNames().contains(updateKey)) {
+ throw new IllegalArgumentException("Update key '" + updateKey
+ "' is not present in the record schema");
+ }
+ }
+
+ // Prepare keyspace/table names
+ if (cassandraTable.contains(".")) {
+ String[] keyspaceAndTable = cassandraTable.split("\\.");
+ updateQuery = QueryBuilder.update(keyspaceAndTable[0],
keyspaceAndTable[1]);
+ } else {
+ updateQuery = QueryBuilder.update(cassandraTable);
+ }
+
+ // Loop through the field names, setting those that are not in the
update key set, and using those
+ // in the update key set as conditions.
+ for (String fieldName : schema.getFieldNames()) {
+ Object fieldValue = recordContentMap.get(fieldName);
+
+ if (updateKeyNames.contains(fieldName)) {
+ updateQuery.where(QueryBuilder.eq(fieldName, fieldValue));
+ } else {
+ Assignment assignment;
+ if (SET_TYPE.getValue().equalsIgnoreCase(updateMethod)) {
+ assignment = QueryBuilder.set(fieldName, fieldValue);
+ } else if
(INCR_TYPE.getValue().equalsIgnoreCase(updateMethod)) {
+ assignment = QueryBuilder.incr(fieldName,
convertFieldObjectToLong(fieldName, fieldValue));
+ } else if
(DECR_TYPE.getValue().equalsIgnoreCase(updateMethod)) {
+ assignment = QueryBuilder.decr(fieldName,
convertFieldObjectToLong(fieldName, fieldValue));
+ } else {
+ throw new IllegalArgumentException("Update Method '" +
updateMethod + "' is not valid.");
+ }
+ updateQuery.with(assignment);
+ }
+ }
+ return updateQuery;
+ }
+
+ private Long convertFieldObjectToLong(String name, Object value) {
+ if (!(value instanceof Number)) {
+ throw new IllegalArgumentException("Field '" + name + "' is not of
type Number");
+ }
+ return ((Number) value).longValue();
+ }
+
+ @Override
+ protected Collection<ValidationResult> customValidate(ValidationContext
validationContext) {
+ Set<ValidationResult> results = (Set<ValidationResult>)
super.customValidate(validationContext);
+
+ String statementType =
validationContext.getProperty(STATEMENT_TYPE).getValue();
+
+ if (UPDATE_TYPE.getValue().equalsIgnoreCase(statementType)) {
+ // Check that update keys are set
+ String updateKeys =
validationContext.getProperty(UPDATE_KEYS).getValue();
+ if (StringUtils.isEmpty(updateKeys)) {
+ results.add(new ValidationResult.Builder().subject("Update
statement configuration").valid(false).explanation(
+ "if the Statement Type is set to Update, then the
Update Keys must be specified as well").build());
+ }
+
+ // Check that if the update method is set to increment or
decrement that the batch statement type is set to
+ // unlogged or counter (or USE_ATTR_TYPE, which we cannot check at
this point).
+ String batchStatementType =
validationContext.getProperty(BATCH_STATEMENT_TYPE).getValue();
+ if (!Sets.newHashSet(COUNTER_TYPE.getValue(),
UNLOGGED_TYPE.getValue(),
BATCH_STATEMENT_TYPE_USE_ATTR_TYPE.getValue()).contains(batchStatementType)) {
Review comment:
Right, I wrote it in the comments but didn't write the actual check. Good
catch :-).
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