[ISSUE 2883] Improve performance of...

[ISSUE 2883] Improve performance of string2messageProperties/messageProperties2String, and save 1 byte for each message.

common/src/main/java/org/apache/rocketmq/common/message/MessageDecoder.java

@@ -409,7 +409,23 @@ public class MessageDecoder {
     }
 
     public static String messageProperties2String(Map<String, String> properties) {
-        StringBuilder sb = new StringBuilder();
+        if (properties == null) {
+            return "";
+        }
+        int len = 0;
+        for (final Map.Entry<String, String> entry : properties.entrySet()) {
+            final String name = entry.getKey();
+            final String value = entry.getValue();
+            if (value == null) {
+                continue;
+            }
+            if (name != null) {
+                len += name.length();
+            }
+            len += value.length();
+            len += 2; // separator
+        }
+        StringBuilder sb = new StringBuilder(len);
         if (properties != null) {
             for (final Map.Entry<String, String> entry : properties.entrySet()) {
                 final String name = entry.getKey();
@@ -423,6 +439,9 @@ public class MessageDecoder {
                 sb.append(value);
                 sb.append(PROPERTY_SEPARATOR);
             }
+            if (sb.length() > 0) {
+                sb.deleteCharAt(sb.length() - 1);
+            }
         }
         return sb.toString();
     }
@@ -430,12 +449,22 @@ public class MessageDecoder {
     public static Map<String, String> string2messageProperties(final String properties) {
         Map<String, String> map = new HashMap<String, String>();
         if (properties != null) {
-            String[] items = properties.split(String.valueOf(PROPERTY_SEPARATOR));
-            for (String i : items) {
-                String[] nv = i.split(String.valueOf(NAME_VALUE_SEPARATOR));
-                if (2 == nv.length) {
-                    map.put(nv[0], nv[1]);
+            int len = properties.length();
+            int index = 0;
+            while (index < len) {
+                int newIndex = properties.indexOf(PROPERTY_SEPARATOR, index);
+                if (newIndex < 0) {
+                    newIndex = len;
+                }
+                if (newIndex - index >= 3) {
+                    int kvSepIndex = properties.indexOf(NAME_VALUE_SEPARATOR, index);
+                    if (kvSepIndex > index && kvSepIndex < newIndex - 1) {
+                        String k = properties.substring(index, kvSepIndex);
+                        String v = properties.substring(kvSepIndex + 1, newIndex);
+                        map.put(k, v);
+                    }
                 }
+                index = newIndex + 1;
             }
         }
 

common/src/test/java/org/apache/rocketmq/common/message/MessageDecoderTest.java

@@ -25,6 +25,8 @@ import java.net.UnknownHostException;
 import java.nio.ByteBuffer;
 import java.util.Map;
 
+import static org.apache.rocketmq.common.message.MessageDecoder.NAME_VALUE_SEPARATOR;
+import static org.apache.rocketmq.common.message.MessageDecoder.PROPERTY_SEPARATOR;
 import static org.apache.rocketmq.common.message.MessageDecoder.createMessageId;
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -265,4 +267,110 @@ public class MessageDecoderTest {
         }
     }
 
+    @Test
+    public void testString2messageProperties() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("k1").append(NAME_VALUE_SEPARATOR).append("v1");
+        Map<String,String> m = MessageDecoder.string2messageProperties(sb.toString());
+        assertThat(m).size().isEqualTo(1);
+        assertThat(m.get("k1")).isEqualTo("v1");
+
+        m = MessageDecoder.string2messageProperties("");
+        assertThat(m).size().isEqualTo(0);
+
+        m = MessageDecoder.string2messageProperties(" ");
+        assertThat(m).size().isEqualTo(0);
+
+        m = MessageDecoder.string2messageProperties("aaa");
+        assertThat(m).size().isEqualTo(0);
+
+        sb.setLength(0);
+        sb.append("k1").append(NAME_VALUE_SEPARATOR);
+        m = MessageDecoder.string2messageProperties(sb.toString());
+        assertThat(m).size().isEqualTo(0);
+
+        sb.setLength(0);
+        sb.append(NAME_VALUE_SEPARATOR).append("v1");
+        m = MessageDecoder.string2messageProperties(sb.toString());
+        assertThat(m).size().isEqualTo(0);
+
+        sb.setLength(0);
+        sb.append("k1").append(NAME_VALUE_SEPARATOR).append("v1").append(PROPERTY_SEPARATOR);
+        m = MessageDecoder.string2messageProperties(sb.toString());
+        assertThat(m).size().isEqualTo(1);
+        assertThat(m.get("k1")).isEqualTo("v1");
+
+        sb.setLength(0);
+        sb.append("k1").append(NAME_VALUE_SEPARATOR).append("v1").append(PROPERTY_SEPARATOR)
+                .append("k2").append(NAME_VALUE_SEPARATOR).append("v2");
+        m = MessageDecoder.string2messageProperties(sb.toString());
+        assertThat(m).size().isEqualTo(2);
+        assertThat(m.get("k1")).isEqualTo("v1");
+        assertThat(m.get("k2")).isEqualTo("v2");
+
+        sb.setLength(0);
+        sb.append("k1").append(NAME_VALUE_SEPARATOR).append("v1").append(PROPERTY_SEPARATOR)
+                .append(NAME_VALUE_SEPARATOR).append("v2");
+        m = MessageDecoder.string2messageProperties(sb.toString());
+        assertThat(m).size().isEqualTo(1);
+        assertThat(m.get("k1")).isEqualTo("v1");
+
+        sb.setLength(0);
+        sb.append("k1").append(NAME_VALUE_SEPARATOR).append("v1").append(PROPERTY_SEPARATOR)
+                .append("k2").append(NAME_VALUE_SEPARATOR);
+        m = MessageDecoder.string2messageProperties(sb.toString());
+        assertThat(m).size().isEqualTo(1);
+        assertThat(m.get("k1")).isEqualTo("v1");
+
+        sb.setLength(0);
+        sb.append(NAME_VALUE_SEPARATOR).append("v1").append(PROPERTY_SEPARATOR)
+                .append("k2").append(NAME_VALUE_SEPARATOR).append("v2");
+        m = MessageDecoder.string2messageProperties(sb.toString());
+        assertThat(m).size().isEqualTo(1);
+        assertThat(m.get("k2")).isEqualTo("v2");
+
+        sb.setLength(0);
+        sb.append("k1").append(NAME_VALUE_SEPARATOR).append(PROPERTY_SEPARATOR)
+                .append("k2").append(NAME_VALUE_SEPARATOR).append("v2");
+        m = MessageDecoder.string2messageProperties(sb.toString());
+        assertThat(m).size().isEqualTo(1);
+        assertThat(m.get("k2")).isEqualTo("v2");
+
+        sb.setLength(0);
+        sb.append("1").append(NAME_VALUE_SEPARATOR).append("1").append(PROPERTY_SEPARATOR)
+                .append("2").append(NAME_VALUE_SEPARATOR).append("2");
+        m = MessageDecoder.string2messageProperties(sb.toString());
+        assertThat(m).size().isEqualTo(2);
+        assertThat(m.get("1")).isEqualTo("1");
+        assertThat(m.get("2")).isEqualTo("2");
+
+        sb.setLength(0);
+        sb.append("1").append(NAME_VALUE_SEPARATOR).append(PROPERTY_SEPARATOR)
+                .append("2").append(NAME_VALUE_SEPARATOR).append("2");
+        m = MessageDecoder.string2messageProperties(sb.toString());
+        assertThat(m).size().isEqualTo(1);
+        assertThat(m.get("2")).isEqualTo("2");
+
+        sb.setLength(0);
+        sb.append(NAME_VALUE_SEPARATOR).append("1").append(PROPERTY_SEPARATOR)
+                .append("2").append(NAME_VALUE_SEPARATOR).append("2");
+        m = MessageDecoder.string2messageProperties(sb.toString());
+        assertThat(m).size().isEqualTo(1);
+        assertThat(m.get("2")).isEqualTo("2");
+
+        sb.setLength(0);
+        sb.append("1").append(NAME_VALUE_SEPARATOR).append("1").append(PROPERTY_SEPARATOR)
+                .append("2").append(NAME_VALUE_SEPARATOR);
+        m = MessageDecoder.string2messageProperties(sb.toString());
+        assertThat(m).size().isEqualTo(1);
+        assertThat(m.get("1")).isEqualTo("1");
+
+        sb.setLength(0);
+        sb.append("1").append(NAME_VALUE_SEPARATOR).append("1").append(PROPERTY_SEPARATOR)
+                .append(NAME_VALUE_SEPARATOR).append("2");
+        m = MessageDecoder.string2messageProperties(sb.toString());
+        assertThat(m).size().isEqualTo(1);
+        assertThat(m.get("1")).isEqualTo("1");
+    }
+
 }
\ No newline at end of file

store/src/test/java/org/apache/rocketmq/store/BatchPutMessageTest.java

@@ -23,7 +23,6 @@ import org.apache.rocketmq.common.message.Message;
 import org.apache.rocketmq.common.message.MessageDecoder;
 import org.apache.rocketmq.common.message.MessageExt;
 import org.apache.rocketmq.common.message.MessageExtBatch;
-import org.apache.rocketmq.common.sysflag.MessageSysFlag;
 import org.apache.rocketmq.store.config.FlushDiskType;
 import org.apache.rocketmq.store.config.MessageStoreConfig;
 import org.apache.rocketmq.store.stats.BrokerStatsManager;
@@ -39,6 +38,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import static org.apache.rocketmq.common.message.MessageDecoder.messageProperties2String;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.Assert.assertTrue;
 
@@ -230,22 +230,6 @@ public class BatchPutMessageTest {
         return msgLen;
     }
 
-    public String messageProperties2String(Map<String, String> properties) {
-        StringBuilder sb = new StringBuilder();
-        if (properties != null) {
-            for (final Map.Entry<String, String> entry : properties.entrySet()) {
-                final String name = entry.getKey();
-                final String value = entry.getValue();
-
-                sb.append(name);
-                sb.append(NAME_VALUE_SEPARATOR);
-                sb.append(value);
-                sb.append(PROPERTY_SEPARATOR);
-            }
-        }
-        return sb.toString();
-    }
-
     private class MyMessageArrivingListener implements MessageArrivingListener {
         @Override
         public void arriving(String topic, int queueId, long logicOffset, long tagsCode, long msgStoreTime,