update canal connector

eventmesh-connectors/eventmesh-connector-canal/build.gradle

@@ -26,6 +26,7 @@ dependencies {
     implementation project(":eventmesh-common")
     implementation canal
     implementation "com.alibaba:druid:1.2.6"
+//    implementation "org.apache.ddlutils:ddlutils:1.0"
     compileOnly 'org.projectlombok:lombok'
     annotationProcessor 'org.projectlombok:lombok'
     testImplementation "org.mockito:mockito-core"

eventmesh-connectors/eventmesh-connector-canal/src/main/java/org/apache/eventmesh/connector/canal/AbstractSqlTemplate.java

@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2010-2101 Alibaba Group Holding Limited.
+ *
+ * Licensed 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.eventmesh.connector.canal;
+
+/**
+ * 默认的基于标准SQL实现的CRUD sql封装
+ *
+ */
+public abstract class AbstractSqlTemplate implements SqlTemplate {
+
+    private static final String DOT = ".";
+
+    public String getSelectSql(String schemaName, String tableName, String[] pkNames, String[] columnNames) {
+        StringBuilder sql = new StringBuilder("select ");
+        int size = columnNames.length;
+        for (int i = 0; i < size; i++) {
+            sql.append(appendEscape(columnNames[i])).append((i + 1 < size) ? " , " : "");
+        }
+
+        sql.append(" from ").append(getFullName(schemaName, tableName)).append(" where ( ");
+        appendColumnEquals(sql, pkNames, "and");
+        sql.append(" ) ");
+        return sql.toString().intern();// 不使用intern，避免方法区内存消耗过多
+    }
+
+    public String getUpdateSql(String schemaName, String tableName, String[] pkNames, String[] columnNames, boolean updatePks, String shardColumn) {
+        StringBuilder sql = new StringBuilder("update " + getFullName(schemaName, tableName) + " set ");
+        appendExcludeSingleShardColumnEquals(sql, columnNames, ",", updatePks, shardColumn);
+        sql.append(" where (");
+        appendColumnEquals(sql, pkNames, "and");
+        sql.append(")");
+        return sql.toString().intern(); // 不使用intern，避免方法区内存消耗过多
+    }
+
+    public String getInsertSql(String schemaName, String tableName, String[] pkNames, String[] columnNames) {
+        StringBuilder sql = new StringBuilder("insert into " + getFullName(schemaName, tableName) + "(");
+        String[] allColumns = new String[pkNames.length + columnNames.length];
+        System.arraycopy(columnNames, 0, allColumns, 0, columnNames.length);
+        System.arraycopy(pkNames, 0, allColumns, columnNames.length, pkNames.length);
+
+        int size = allColumns.length;
+        for (int i = 0; i < size; i++) {
+            sql.append(appendEscape(allColumns[i])).append((i + 1 < size) ? "," : "");
+        }
+
+        sql.append(") values (");
+        appendColumnQuestions(sql, allColumns);
+        sql.append(")");
+        return sql.toString().intern();// intern优化，避免出现大量相同的字符串
+    }
+
+    public String getDeleteSql(String schemaName, String tableName, String[] pkNames) {
+        StringBuilder sql = new StringBuilder("delete from " + getFullName(schemaName, tableName) + " where ");
+        appendColumnEquals(sql, pkNames, "and");
+        return sql.toString().intern();// intern优化，避免出现大量相同的字符串
+    }
+
+    protected String getFullName(String schemaName, String tableName) {
+        StringBuilder sb = new StringBuilder();
+        if (schemaName != null) {
+            sb.append(appendEscape(schemaName)).append(DOT);
+        }
+        sb.append(appendEscape(tableName));
+        return sb.toString().intern();
+    }
+
+    // ================ helper method ============
+
+    protected String appendEscape(String columnName) {
+        return columnName;
+    }
+
+    protected void appendColumnQuestions(StringBuilder sql, String[] columns) {
+        int size = columns.length;
+        for (int i = 0; i < size; i++) {
+            sql.append("?").append((i + 1 < size) ? " , " : "");
+        }
+    }
+
+    protected void appendColumnEquals(StringBuilder sql, String[] columns, String separator) {
+        int size = columns.length;
+        for (int i = 0; i < size; i++) {
+            sql.append(" ").append(appendEscape(columns[i])).append(" = ").append("? ");
+            if (i != size - 1) {
+                sql.append(separator);
+            }
+        }
+    }
+
+    /**
+     * 针对DRDS改造, 在 update set 集合中, 排除 单个拆分键 的赋值操作
+     * @param sql
+     * @param columns
+     * @param separator
+     * @param excludeShardColumn 需要排除的 拆分列
+     */
+    protected void appendExcludeSingleShardColumnEquals(StringBuilder sql, String[] columns, String separator, boolean updatePks, String excludeShardColumn) {
+        int size = columns.length;
+        for (int i = 0; i < size; i++) {
+            // 如果是DRDS数据库, 并且存在拆分键 且 等于当前循环列, 跳过
+            if(!updatePks && columns[i].equals(excludeShardColumn)){
+                continue;
+            }
+            sql.append(" ").append(appendEscape(columns[i])).append(" = ").append("? ");
+            if (i != size - 1) {
+                sql.append(separator);
+            }
+        }
+    }
+}

eventmesh-connectors/eventmesh-connector-canal/src/main/java/org/apache/eventmesh/connector/canal/CanalConnectRecord.java

@@ -31,9 +31,8 @@
 @Data
 public class CanalConnectRecord {
 
-    private String tableName;
-
     private String schemaName;
+    private String tableName;
 
     /**
      * 变更数据的业务类型(I/U/D/C/A/E),与canal中的EntryProtocol中定义的EventType一致.

eventmesh-connectors/eventmesh-connector-canal/src/main/java/org/apache/eventmesh/connector/canal/MysqlSqlTemplate.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2010-2101 Alibaba Group Holding Limited.
+ *
+ * Licensed 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.eventmesh.connector.canal;
+
+/**
+ * mysql sql生成模板
+ *
+ */
+public class MysqlSqlTemplate extends AbstractSqlTemplate {
+
+    private static final String ESCAPE = "`";
+
+    public String getMergeSql(String schemaName, String tableName, String[] pkNames, String[] columnNames,
+                              String[] viewColumnNames, boolean includePks, String shardColumn) {
+        StringBuilder sql = new StringBuilder("insert into " + getFullName(schemaName, tableName) + "(");
+        int size = columnNames.length;
+        for (int i = 0; i < size; i++) {
+            sql.append(appendEscape(columnNames[i])).append(" , ");
+        }
+        size = pkNames.length;
+        for (int i = 0; i < size; i++) {
+            sql.append(appendEscape(pkNames[i])).append((i + 1 < size) ? " , " : "");
+        }
+
+        sql.append(") values (");
+        size = columnNames.length;
+        for (int i = 0; i < size; i++) {
+            sql.append("?").append(" , ");
+        }
+        size = pkNames.length;
+        for (int i = 0; i < size; i++) {
+            sql.append("?").append((i + 1 < size) ? " , " : "");
+        }
+        sql.append(")");
+        sql.append(" on duplicate key update ");
+
+        size = columnNames.length;
+        for (int i = 0; i < size; i++) {
+            // 如果是DRDS数据库, 并且存在拆分键 且 等于当前循环列, 跳过
+            if(!includePks && shardColumn != null && columnNames[i].equals(shardColumn)){
+                continue;
+            }
+
+            sql.append(appendEscape(columnNames[i]))
+                .append("=values(")
+                .append(appendEscape(columnNames[i]))
+                .append(")");
+            if (includePks) {
+                sql.append(" , ");
+            } else {
+                sql.append((i + 1 < size) ? " , " : "");
+            }
+        }
+
+        if (includePks) {
+            // mysql merge sql匹配了uniqe / primary key时都会执行update，所以需要更新pk信息
+            size = pkNames.length;
+            for (int i = 0; i < size; i++) {
+                sql.append(appendEscape(pkNames[i])).append("=values(").append(appendEscape(pkNames[i])).append(")");
+                sql.append((i + 1 < size) ? " , " : "");
+            }
+        }
+
+        return sql.toString().intern();// intern优化，避免出现大量相同的字符串
+    }
+
+    protected String appendEscape(String columnName) {
+        return ESCAPE + columnName + ESCAPE;
+    }
+
+}

eventmesh-connectors/eventmesh-connector-canal/src/main/java/org/apache/eventmesh/connector/canal/SqlTemplate.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2010-2101 Alibaba Group Holding Limited.
+ *
+ * Licensed 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.eventmesh.connector.canal;
+
+/**
+ * sql构造模板操作
+ *
+ */
+public interface SqlTemplate {
+
+    public String getSelectSql(String schemaName, String tableName, String[] pkNames, String[] columnNames);
+
+    public String getUpdateSql(String schemaName, String tableName, String[] pkNames, String[] columnNames, boolean updatePks, String shardColumn);
+
+    public String getDeleteSql(String schemaName, String tableName, String[] pkNames);
+
+    public String getInsertSql(String schemaName, String tableName, String[] pkNames, String[] columnNames);
+
+    /**
+     * 获取对应的mergeSql
+     */
+    public String getMergeSql(String schemaName, String tableName, String[] pkNames, String[] columnNames,
+                              String[] viewColumnNames, boolean updatePks, String shardColumn);
+}