Add feature configuration changed event and subscribe at encrypt module

features/encrypt/core/pom.xml

@@ -43,6 +43,11 @@
             <artifactId>shardingsphere-infra-merge</artifactId>
             <version>${project.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.shardingsphere</groupId>
+            <artifactId>shardingsphere-mode-core</artifactId>
+            <version>${project.version}</version>
+        </dependency>
 
         <dependency>
             <groupId>org.apache.shardingsphere</groupId>

features/encrypt/core/src/main/java/org/apache/shardingsphere/encrypt/event/EncryptRuleConfigurationEventBuilder.java

@@ -0,0 +1,90 @@
+/*
+ * 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 org.apache.shardingsphere.encrypt.event;
+
+import com.google.common.base.Strings;
+import org.apache.shardingsphere.encrypt.api.config.rule.EncryptTableRuleConfiguration;
+import org.apache.shardingsphere.encrypt.event.config.AddEncryptConfigurationEvent;
+import org.apache.shardingsphere.encrypt.event.config.AlterEncryptConfigurationEvent;
+import org.apache.shardingsphere.encrypt.event.config.DeleteEncryptConfigurationEvent;
+import org.apache.shardingsphere.encrypt.event.encryptor.AddEncryptorEvent;
+import org.apache.shardingsphere.encrypt.event.encryptor.AlterEncryptorEvent;
+import org.apache.shardingsphere.encrypt.event.encryptor.DeleteEncryptorEvent;
+import org.apache.shardingsphere.encrypt.metadata.converter.EncryptNodeConverter;
+import org.apache.shardingsphere.encrypt.yaml.config.YamlEncryptRuleConfiguration;
+import org.apache.shardingsphere.encrypt.yaml.swapper.YamlEncryptRuleConfigurationSwapper;
+import org.apache.shardingsphere.infra.config.algorithm.AlgorithmConfiguration;
+import org.apache.shardingsphere.infra.rule.event.GovernanceEvent;
+import org.apache.shardingsphere.infra.util.yaml.YamlEngine;
+import org.apache.shardingsphere.infra.yaml.config.pojo.algorithm.YamlAlgorithmConfiguration;
+import org.apache.shardingsphere.infra.yaml.config.swapper.algorithm.YamlAlgorithmConfigurationSwapper;
+import org.apache.shardingsphere.mode.event.DataChangedEvent;
+import org.apache.shardingsphere.mode.event.DataChangedEvent.Type;
+import org.apache.shardingsphere.mode.event.config.RuleConfigurationEventBuilder;
+
+import java.util.Optional;
+
+/**
+ * Encrypt rule configuration event builder.
+ */
+public final class EncryptRuleConfigurationEventBuilder implements RuleConfigurationEventBuilder {
+
+    @Override
+    public Optional<GovernanceEvent> build(final String databaseName, final DataChangedEvent event) {
+        if (!EncryptNodeConverter.isEncryptPath(event.getKey()) || Strings.isNullOrEmpty(event.getValue())) {
+            return Optional.empty();
+        }
+        Optional<String> tableName = EncryptNodeConverter.getTableName(event.getKey());
+        if (tableName.isPresent() && !Strings.isNullOrEmpty(event.getValue())) {
+            return createEncryptConfigEvent(databaseName, tableName.get(), event);
+        }
+        Optional<String> encryptorName = EncryptNodeConverter.getEncryptorName(event.getKey());
+        if (encryptorName.isPresent() && !Strings.isNullOrEmpty(event.getValue())) {
+            return createEncryptorEvent(databaseName, encryptorName.get(), event);
+        }
+        return Optional.empty();
+    }
+
+    private Optional<GovernanceEvent> createEncryptConfigEvent(final String databaseName, final String groupName, final DataChangedEvent event) {
+        if (Type.ADDED == event.getType()) {
+            return Optional.of(new AddEncryptConfigurationEvent<>(databaseName, swapEncryptTableRuleConfig(event.getValue())));
+        }
+        if (Type.UPDATED == event.getType()) {
+            return Optional.of(new AlterEncryptConfigurationEvent<>(databaseName, groupName, swapEncryptTableRuleConfig(event.getValue())));
+        }
+        return Optional.of(new DeleteEncryptConfigurationEvent(databaseName, groupName));
+    }
+
+    private EncryptTableRuleConfiguration swapEncryptTableRuleConfig(final String yamlContext) {
+        return new YamlEncryptRuleConfigurationSwapper().swapToObject(YamlEngine.unmarshal(yamlContext, YamlEncryptRuleConfiguration.class)).getTables().iterator().next();
+    }
+
+    private Optional<GovernanceEvent> createEncryptorEvent(final String databaseName, final String encryptorName, final DataChangedEvent event) {
+        if (Type.ADDED == event.getType()) {
+            return Optional.of(new AddEncryptorEvent<>(databaseName, encryptorName, swapToAlgorithmConfig(event.getValue())));
+        }
+        if (Type.UPDATED == event.getType()) {
+            return Optional.of(new AlterEncryptorEvent<>(databaseName, encryptorName, swapToAlgorithmConfig(event.getValue())));
+        }
+        return Optional.of(new DeleteEncryptorEvent(databaseName, encryptorName));
+    }
+
+    private AlgorithmConfiguration swapToAlgorithmConfig(final String yamlContext) {
+        return new YamlAlgorithmConfigurationSwapper().swapToObject(YamlEngine.unmarshal(yamlContext, YamlAlgorithmConfiguration.class));
+    }
+}

features/encrypt/core/src/main/java/org/apache/shardingsphere/encrypt/event/config/AddEncryptConfigurationEvent.java

@@ -0,0 +1,36 @@
+/*
+ * 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 org.apache.shardingsphere.encrypt.event.config;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import org.apache.shardingsphere.infra.rule.event.GovernanceEvent;
+
+/**
+ * Add encrypt configuration event.
+ *
+ * @param <T> encrypt configuration
+ */
+@RequiredArgsConstructor
+@Getter
+public final class AddEncryptConfigurationEvent<T> implements GovernanceEvent {
+
+    private final String databaseName;
+
+    private final T config;
+}

features/encrypt/core/src/main/java/org/apache/shardingsphere/encrypt/event/config/AlterEncryptConfigurationEvent.java

@@ -0,0 +1,38 @@
+/*
+ * 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 org.apache.shardingsphere.encrypt.event.config;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import org.apache.shardingsphere.infra.rule.event.GovernanceEvent;
+
+/**
+ * Alter encrypt configuration event.
+ *
+ * @param <T> encrypt configuration
+ */
+@RequiredArgsConstructor
+@Getter
+public final class AlterEncryptConfigurationEvent<T> implements GovernanceEvent {
+
+    private final String databaseName;
+
+    private final String tableName;
+
+    private final T config;
+}

features/encrypt/core/src/main/java/org/apache/shardingsphere/encrypt/event/config/DeleteEncryptConfigurationEvent.java

@@ -0,0 +1,34 @@
+/*
+ * 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 org.apache.shardingsphere.encrypt.event.config;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import org.apache.shardingsphere.infra.rule.event.GovernanceEvent;
+
+/**
+ * Delete encrypt configuration event.
+ */
+@RequiredArgsConstructor
+@Getter
+public final class DeleteEncryptConfigurationEvent implements GovernanceEvent {
+
+    private final String databaseName;
+
+    private final String tableName;
+}

features/encrypt/core/src/main/java/org/apache/shardingsphere/encrypt/event/encryptor/AddEncryptorEvent.java

@@ -0,0 +1,38 @@
+/*
+ * 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 org.apache.shardingsphere.encrypt.event.encryptor;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import org.apache.shardingsphere.infra.rule.event.GovernanceEvent;
+
+/**
+ * Add encryptor event.
+ *
+ * @param <T> encryptor configuration
+ */
+@RequiredArgsConstructor
+@Getter
+public final class AddEncryptorEvent<T> implements GovernanceEvent {
+
+    private final String databaseName;
+
+    private final String encryptorName;
+
+    private final T config;
+}

features/encrypt/core/src/main/java/org/apache/shardingsphere/encrypt/event/encryptor/AlterEncryptorEvent.java

@@ -0,0 +1,38 @@
+/*
+ * 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 org.apache.shardingsphere.encrypt.event.encryptor;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import org.apache.shardingsphere.infra.rule.event.GovernanceEvent;
+
+/**
+ * Alter encryptor event.
+ *
+ * @param <T> encryptor configuration
+ */
+@RequiredArgsConstructor
+@Getter
+public final class AlterEncryptorEvent<T> implements GovernanceEvent {
+
+    private final String databaseName;
+
+    private final String encryptorName;
+
+    private final T config;
+}

features/encrypt/core/src/main/java/org/apache/shardingsphere/encrypt/event/encryptor/DeleteEncryptorEvent.java

@@ -0,0 +1,34 @@
+/*
+ * 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 org.apache.shardingsphere.encrypt.event.encryptor;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import org.apache.shardingsphere.infra.rule.event.GovernanceEvent;
+
+/**
+ * Delete encryptor event.
+ */
+@RequiredArgsConstructor
+@Getter
+public final class DeleteEncryptorEvent implements GovernanceEvent {
+
+    private final String databaseName;
+
+    private final String encryptorName;
+}