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immutable TbMsgMetaData.EMPTY

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This commit is contained in:
Sergey Matvienko 2022-01-10 23:55:58 +02:00
parent f5c09d221d
commit a11146b445
1 changed files with 8 additions and 1 deletions
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9
common/message/src/main/java/org/thingsboard/server/common/msg/TbMsgMetaData.java
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@ -29,7 +29,7 @@ import java.util.concurrent.ConcurrentHashMap;
@Data
public final class TbMsgMetaData implements Serializable {
public static final TbMsgMetaData EMPTY = new TbMsgMetaData(Collections.emptyMap());
public static final TbMsgMetaData EMPTY = new TbMsgMetaData(0);
private final Map<String, String> data;
@ -41,6 +41,13 @@ public final class TbMsgMetaData implements Serializable {
this.data = new ConcurrentHashMap<>(data);
}
/**
* Internal constructor to create immutable TbMsgMetaData.EMPTY
* */
private TbMsgMetaData(int ignored) {
this.data = Collections.emptyMap();
}
public String getValue(String key) {
return data.get(key);
}