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feat: add connect templates and simplify JDBC source (MINOR) (#3231)
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77 changes: 77 additions & 0 deletions
77
ksql-engine/src/main/java/io/confluent/ksql/connect/supported/Connectors.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| /* | ||
| * Copyright 2019 Confluent Inc. | ||
| * | ||
| * Licensed under the Confluent Community License (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.confluent.io/confluent-community-license | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | ||
| * WARRANTIES OF ANY KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations under the License. | ||
| */ | ||
|
|
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| package io.confluent.ksql.connect.supported; | ||
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| import com.google.common.collect.ImmutableMap; | ||
| import io.confluent.ksql.connect.Connector; | ||
| import java.util.EnumSet; | ||
| import java.util.Map; | ||
| import java.util.Objects; | ||
| import java.util.Optional; | ||
| import java.util.function.Function; | ||
| import java.util.stream.Collectors; | ||
| import org.apache.kafka.connect.runtime.rest.entities.ConnectorInfo; | ||
|
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| public enum Connectors implements SupportedConnector { | ||
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| JDBC(JdbcSource.JDBC_SOURCE_CLASS, new JdbcSource()) | ||
| ; | ||
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| public static final String CONNECTOR_CLASS = "connector.class"; | ||
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| private static final Map<String, SupportedConnector> CONNECTORS = ImmutableMap.copyOf( | ||
| EnumSet.allOf(Connectors.class) | ||
| .stream() | ||
| .collect(Collectors.toMap( | ||
| Connectors::getConnectorClass, | ||
| Function.identity())) | ||
| ); | ||
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| private final String connectorClass; | ||
| private final SupportedConnector supportedConnector; | ||
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| Connectors(final String connectorClass, final SupportedConnector supportedConnector) { | ||
| this.connectorClass = Objects.requireNonNull(connectorClass, "connectorClass"); | ||
| this.supportedConnector = Objects.requireNonNull(supportedConnector, "supportedConnector"); | ||
| } | ||
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| public static Optional<Connector> from(final ConnectorInfo info) { | ||
| final SupportedConnector connector = | ||
| CONNECTORS.get(info.config().get(CONNECTOR_CLASS)); | ||
| return connector == null ? Optional.empty() : connector.fromConnectInfo(info); | ||
| } | ||
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| public static Map<String, String> resolve(final Map<String, String> configs) { | ||
| final SupportedConnector connector = | ||
| CONNECTORS.get(configs.get(CONNECTOR_CLASS)); | ||
| return connector == null ? configs : connector.resolveConfigs(configs); | ||
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| } | ||
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| @Override | ||
| public Optional<Connector> fromConnectInfo(final ConnectorInfo info) { | ||
| return supportedConnector.fromConnectInfo(info); | ||
| } | ||
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| @Override | ||
| public Map<String, String> resolveConfigs(final Map<String, String> configs) { | ||
| return supportedConnector.resolveConfigs(configs); | ||
| } | ||
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| public String getConnectorClass() { | ||
| return connectorClass; | ||
| } | ||
| } |
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40 changes: 40 additions & 0 deletions
40
ksql-engine/src/main/java/io/confluent/ksql/connect/supported/SupportedConnector.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| /* | ||
| * Copyright 2019 Confluent Inc. | ||
| * | ||
| * Licensed under the Confluent Community License (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.confluent.io/confluent-community-license | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | ||
| * WARRANTIES OF ANY KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations under the License. | ||
| */ | ||
|
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| package io.confluent.ksql.connect.supported; | ||
|
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| import io.confluent.ksql.connect.Connector; | ||
| import java.util.Map; | ||
| import java.util.Optional; | ||
| import org.apache.kafka.connect.runtime.rest.entities.ConnectorInfo; | ||
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| /** | ||
| * KSQL supports some "Blessed" connectors that we integrate well with. To be "blessed" | ||
| * means that we can automatically import topics created by these connectors and that | ||
| * we may provide templates that simplify configuration of these connectors. | ||
| */ | ||
| public interface SupportedConnector { | ||
|
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| /** | ||
| * Constructs a {@link Connector} from the configuration given to us by connect. | ||
| */ | ||
| Optional<Connector> fromConnectInfo(ConnectorInfo info); | ||
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| /** | ||
| * Resolves a template configuration into something that connect can understand. | ||
| */ | ||
| Map<String, String> resolveConfigs(Map<String, String> configs); | ||
|
|
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| } |
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