Class DigestingEntityProducer
- java.lang.Object
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- org.apache.hc.core5.http.nio.entity.DigestingEntityProducer
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- All Implemented Interfaces:
EntityDetails
,AsyncDataProducer
,AsyncEntityProducer
,ResourceHolder
public class DigestingEntityProducer extends java.lang.Object implements AsyncEntityProducer
AsyncEntityProducer
decorator that calculates a digest hash from the data stream content and appends its value to the list of trailers.- Since:
- 5.0
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Field Summary
Fields Modifier and Type Field Description private byte[]
digest
private java.security.MessageDigest
digester
private AsyncEntityProducer
wrapped
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Constructor Summary
Constructors Constructor Description DigestingEntityProducer(java.lang.String algo, AsyncEntityProducer wrapped)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
available()
Returns the number of bytes immediately available for output.void
failed(java.lang.Exception cause)
Triggered to signal a failure in data generation.java.lang.String
getContentEncoding()
Returns content encoding of the entity, if known.long
getContentLength()
Returns length of the entity, if known.java.lang.String
getContentType()
Returns content type of the entity, if known.byte[]
getDigest()
Returns digest hash.java.util.Set<java.lang.String>
getTrailerNames()
Preliminary declaration of trailing headers.boolean
isChunked()
Returns chunked transfer hint for this entity.boolean
isRepeatable()
Determines whether the producer can consistently produce the same content after invocation ofResourceHolder.releaseResources()
.void
produce(DataStreamChannel channel)
Triggered to signal the ability of the underlying data channel to accept more data.void
releaseResources()
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Field Detail
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wrapped
private final AsyncEntityProducer wrapped
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digester
private final java.security.MessageDigest digester
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digest
private volatile byte[] digest
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Constructor Detail
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DigestingEntityProducer
public DigestingEntityProducer(java.lang.String algo, AsyncEntityProducer wrapped)
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Method Detail
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isRepeatable
public boolean isRepeatable()
Description copied from interface:AsyncEntityProducer
Determines whether the producer can consistently produce the same content after invocation ofResourceHolder.releaseResources()
.- Specified by:
isRepeatable
in interfaceAsyncEntityProducer
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getContentLength
public long getContentLength()
Description copied from interface:EntityDetails
Returns length of the entity, if known.- Specified by:
getContentLength
in interfaceEntityDetails
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getContentType
public java.lang.String getContentType()
Description copied from interface:EntityDetails
Returns content type of the entity, if known.- Specified by:
getContentType
in interfaceEntityDetails
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getContentEncoding
public java.lang.String getContentEncoding()
Description copied from interface:EntityDetails
Returns content encoding of the entity, if known.- Specified by:
getContentEncoding
in interfaceEntityDetails
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isChunked
public boolean isChunked()
Description copied from interface:EntityDetails
Returns chunked transfer hint for this entity.The behavior of wrapping entities is implementation dependent, but should respect the primary purpose.
- Specified by:
isChunked
in interfaceEntityDetails
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getTrailerNames
public java.util.Set<java.lang.String> getTrailerNames()
Description copied from interface:EntityDetails
Preliminary declaration of trailing headers.- Specified by:
getTrailerNames
in interfaceEntityDetails
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available
public int available()
Description copied from interface:AsyncDataProducer
Returns the number of bytes immediately available for output. This method can be used as a hint to control output events of the underlying I/O session.- Specified by:
available
in interfaceAsyncDataProducer
- Returns:
- the number of bytes immediately available for output
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produce
public void produce(DataStreamChannel channel) throws java.io.IOException
Description copied from interface:AsyncDataProducer
Triggered to signal the ability of the underlying data channel to accept more data. The data producer can choose to write data immediately inside the call or asynchronously at some later point.- Specified by:
produce
in interfaceAsyncDataProducer
- Parameters:
channel
- the data channel capable to accepting more data.- Throws:
java.io.IOException
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failed
public void failed(java.lang.Exception cause)
Description copied from interface:AsyncEntityProducer
Triggered to signal a failure in data generation.- Specified by:
failed
in interfaceAsyncEntityProducer
- Parameters:
cause
- the cause of the failure.
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releaseResources
public void releaseResources()
- Specified by:
releaseResources
in interfaceResourceHolder
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getDigest
public byte[] getDigest()
Returns digest hash.- Returns:
- the digest hash value.
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