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Added functionality to get store schema
Example: ========== curl http://localhost:8080/schemata/dGVzdA== {"key-serializer": "SerializerDefinition(name = string, schema-info = {}, compression = null)", "value-serializer": "SerializerDefinition(name = string, schema-info = {}, compression = null)"}
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81 changes: 81 additions & 0 deletions
81
src/java/voldemort/coordinator/GetSchemataRequestExecutor.java
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package voldemort.coordinator; | ||
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import static org.jboss.netty.handler.codec.http.HttpHeaders.Names.CONTENT_LENGTH; | ||
import static org.jboss.netty.handler.codec.http.HttpHeaders.Names.CONTENT_TRANSFER_ENCODING; | ||
import static org.jboss.netty.handler.codec.http.HttpHeaders.Names.CONTENT_TYPE; | ||
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.OK; | ||
import static org.jboss.netty.handler.codec.http.HttpVersion.HTTP_1_1; | ||
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import org.apache.avro.Schema; | ||
import org.apache.avro.generic.GenericData; | ||
import org.apache.log4j.Logger; | ||
import org.jboss.netty.buffer.ChannelBuffer; | ||
import org.jboss.netty.buffer.ChannelBuffers; | ||
import org.jboss.netty.channel.MessageEvent; | ||
import org.jboss.netty.handler.codec.http.DefaultHttpResponse; | ||
import org.jboss.netty.handler.codec.http.HttpResponse; | ||
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import voldemort.client.SocketStoreClientFactory; | ||
import voldemort.store.StoreDefinition; | ||
import voldemort.utils.StoreDefinitionUtils; | ||
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public class GetSchemataRequestExecutor implements Runnable { | ||
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private SocketStoreClientFactory storeClientFactory; | ||
private String storeName; | ||
private final Logger logger = Logger.getLogger(GetSchemataRequestExecutor.class); | ||
private ChannelBuffer responseContent; | ||
private MessageEvent getRequestMessageEvent; | ||
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String SCHEMATAJSON = "{\"type\": \"record\", \"name\": \"storeserializer\",\"fields\": [" | ||
+ "{ \"name\": \"key-serializer\", \"type\": \"string\" } ," | ||
+ "{ \"name\": \"value-serializer\", \"type\": \"string\"}]}"; | ||
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public GetSchemataRequestExecutor(MessageEvent requestEvent, | ||
String storeName, | ||
SocketStoreClientFactory storeClientFactory) { | ||
this.storeClientFactory = storeClientFactory; | ||
this.storeName = storeName; | ||
this.getRequestMessageEvent = requestEvent; | ||
} | ||
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@Override | ||
public void run() { | ||
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StoreDefinition storeDef = StoreDefinitionUtils.getStoreDefinitionWithName(storeClientFactory.getStoreDefs(), | ||
storeName); | ||
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String keySerializer = storeDef.getKeySerializer().toString(); | ||
String valueSerializer = storeDef.getValueSerializer().toString(); | ||
GenericData.Record record = new GenericData.Record(Schema.parse(SCHEMATAJSON)); | ||
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record.put("key-serializer", keySerializer); | ||
record.put("value-serializer", valueSerializer); | ||
writeResponse(record.toString().getBytes()); | ||
} | ||
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public void writeResponse(byte[] responseValue) { | ||
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this.responseContent = ChannelBuffers.dynamicBuffer(responseValue.length); | ||
this.responseContent.writeBytes(responseValue); | ||
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// 1. Create the Response object | ||
HttpResponse response = new DefaultHttpResponse(HTTP_1_1, OK); | ||
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// 2. Set the right headers | ||
response.setHeader(CONTENT_TYPE, "binary"); | ||
response.setHeader(CONTENT_TRANSFER_ENCODING, "binary"); | ||
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// 3. Copy the data into the payload | ||
response.setContent(responseContent); | ||
response.setHeader(CONTENT_LENGTH, response.getContent().readableBytes()); | ||
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if(logger.isDebugEnabled()) { | ||
logger.debug("Response = " + response); | ||
} | ||
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// Write the response to the Netty Channel | ||
this.getRequestMessageEvent.getChannel().write(response); | ||
} | ||
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} |
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