Package org.apache.storm.state
Interface StateEncoder<K,V,KENCODEDT,VENCODEDT>
- All Known Implementing Classes:
DefaultStateEncoder
public interface StateEncoder<K,V,KENCODEDT,VENCODEDT>
The interface of State Encoder.
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Method Summary
Modifier and TypeMethodDescriptionDecode key.decodeValue
(VENCODEDT encodedValue) Decode value.Encode key.encodeValue
(V value) Encode value.Get the tombstone value (deletion mark).
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Method Details
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encodeKey
Encode key.- Parameters:
key
- the value of key (K type)- Returns:
- the encoded value of key (KENCODEDT type)
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encodeValue
Encode value.- Parameters:
value
- the value of value (V type)- Returns:
- the encoded value of value (VENCODEDT type)
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decodeKey
Decode key.- Parameters:
encodedKey
- the value of key (KRAW type)- Returns:
- the decoded value of key (K type)
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decodeValue
Decode value.- Parameters:
encodedValue
- the value of key (VENCODEDT type)- Returns:
- the decoded value of key (V type)
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getTombstoneValue
VENCODEDT getTombstoneValue()Get the tombstone value (deletion mark).- Returns:
- the tomestone value (VENCODEDT type)
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