import com.google.common.base.Preconditions;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
public class ShardIdentifier {
private final String shardName;
private final String memberName;
private final String type;
+ //format and pattern should be in sync
+ private final String format = "%s-shard-%s-%s";
+ private static final Pattern pattern = Pattern.compile("(\\S+)-shard-(\\S+)-(\\S+)");
public ShardIdentifier(String shardName, String memberName, String type) {
}
@Override public String toString() {
- StringBuilder builder = new StringBuilder();
- builder.append(memberName).append("-shard-").append(shardName).append("-").append(type);
- return builder.toString();
+ //ensure the output of toString matches the pattern above
+ return new StringBuilder(memberName)
+ .append("-shard-")
+ .append(shardName)
+ .append("-")
+ .append(type)
+ .toString();
}
public static Builder builder(){
return new Builder();
}
+ public String getShardName() {
+ return shardName;
+ }
+
+ public String getMemberName() {
+ return memberName;
+ }
+
+ public String getType() {
+ return type;
+ }
+
public static class Builder {
private String shardName;
private String memberName;
return this;
}
+ public Builder fromShardIdString(String shardId){
+ Matcher matcher = pattern.matcher(shardId);
+
+ if (matcher.matches()) {
+ memberName = matcher.group(1);
+ shardName = matcher.group(2);
+ type = matcher.group(3);
+ }
+ return this;
+ }
}
}