'commit'

Doc/ OpenGauss常用命令.txt

@@ -1,3 +1,6 @@
+# 使用gs_probackup进行openGauss数据库物理备份与恢复
+https://blog.csdn.net/GaussDB/article/details/128452082
+
 # 查询数据库相应用户dsideal的所有序列
 SELECT
 	*

src/main/java/UnitTest/App.java

@@ -0,0 +1,102 @@
+package UnitTest;
+
+import org.apache.kafka.clients.producer.KafkaProducer;
+import org.apache.kafka.clients.producer.ProducerConfig;
+import org.apache.kafka.clients.producer.ProducerRecord;
+import org.postgresql.PGProperty;
+import org.postgresql.jdbc.PgConnection;
+import org.postgresql.replication.LogSequenceNumber;
+import org.postgresql.replication.PGReplicationStream;
+
+import java.nio.ByteBuffer;
+import java.sql.DriverManager;
+import java.util.Properties;
+import java.util.concurrent.TimeUnit;
+
+public class App {
+
+    public static String SOURCEURL = "jdbc:postgresql://10.10.14.209:5432/ccdjzswd_db";
+    public static String USER = "postgres";
+    public static String PASSWD = "DsideaL147258368";
+
+    public static String TOPIC = "pg_test";//定义主题
+
+    public static final String BROKERS_ADDRESS = "10.10.14.67:9094";
+//    public static final int REQUEST_REQUIRED_ACKS = 1;
+//    public static final String CLIENT_ID = "producer_test_id";
+
+    public static void main(String[] args) throws Exception {
+
+        Properties props = new Properties();
+        props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, BROKERS_ADDRESS);
+        props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringSerializer");
+        props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringSerializer");
+//        props.put(ProducerConfig.ACKS_CONFIG, String.valueOf(REQUEST_REQUIRED_ACKS));
+//        props.put(ProducerConfig.CLIENT_ID_CONFIG, CLIENT_ID);
+        KafkaProducer<String, String> kafkaProducer = new KafkaProducer(props);
+
+
+        Properties properties = new Properties();
+        PGProperty.USER.set(properties, USER);
+        PGProperty.PASSWORD.set(properties, PASSWD);
+        PGProperty.ASSUME_MIN_SERVER_VERSION.set(properties, "9.4");
+        PGProperty.REPLICATION.set(properties, "database");
+        PGProperty.PREFER_QUERY_MODE.set(properties, "simple");
+
+        Class.forName("org.postgresql.Driver");
+
+
+        PgConnection conn = (PgConnection) DriverManager.getConnection(SOURCEURL, properties);
+        System.out.println("connection success!");
+
+        String slotName = "replication_slot";
+        String lsn = "22DBF70";
+
+        LogSequenceNumber waitLSN = LogSequenceNumber.valueOf(lsn);
+
+        PGReplicationStream stream = conn
+                .getReplicationAPI()
+                .replicationStream()
+                .logical()
+                .withSlotName(slotName)
+                .withSlotOption("include-xids", false)
+                .withSlotOption("skip-empty-xacts", true)
+                .withStartPosition(waitLSN)
+//                        .withSlotOption("parallel-decode-num", 10) //解;解码线程并发度
+//                        .withSlotOption("white-table-list", "public.logic_test") //白名单列表
+//                        .withSlotOption("standby-connection", true) //强制备机解码
+//                        .withSlotOption("decode-style", "t") //解码格式
+//                        .withSlotOption("sending-bacth", 1) //批量发送解码结果
+                .start();
+
+        while (true) {
+
+            ByteBuffer byteBuffer = stream.readPending();
+
+            if (byteBuffer == null) {
+                TimeUnit.MILLISECONDS.sleep(10L);
+                continue;
+            }
+
+            int offset = byteBuffer.arrayOffset();
+            byte[] source = byteBuffer.array();
+            int length = source.length - offset;
+
+            String res = new String(source, offset, length);
+
+            ProducerRecord<String, String> record = new ProducerRecord<String, String>(TOPIC, res);
+            kafkaProducer.send(record);
+            System.out.println("send ok ==> "+res);
+
+
+            //如果需要flush lsn，根据业务实际情况调用以下接口
+            LogSequenceNumber lastRecv = stream.getLastReceiveLSN();
+            System.out.println(lastRecv);
+//                    stream.setFlushedLSN(lastRecv);
+//                    stream.forceUpdateStatus();
+
+        }
+    }
+
+}
+