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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.prelude.fastsearch;
import com.yahoo.slime.BinaryFormat;
import com.yahoo.slime.Slime;
import com.yahoo.data.access.slime.SlimeAdapter;
import com.yahoo.vespa.config.search.SummaryConfig;
import com.yahoo.prelude.ConfigurationException;
import com.yahoo.container.search.LegacyEmulationConfig;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.logging.Logger;
/**
* A set of docsum definitions
*
* @author bratseth
* @author Bjørn Borud
*/
public final class DocsumDefinitionSet {
public static final int SLIME_MAGIC_ID = 0x55555555;
private final static Logger log = Logger.getLogger(DocsumDefinitionSet.class.getName());
private final HashMap<Long, DocsumDefinition> definitions = new HashMap<>();
private final HashMap<String, DocsumDefinition> definitionsByName = new HashMap<>();
private final LegacyEmulationConfig emulationConfig;
public DocsumDefinitionSet(DocumentdbInfoConfig.Documentdb config) {
this.emulationConfig = new LegacyEmulationConfig(new LegacyEmulationConfig.Builder());
configure(config);
}
public DocsumDefinitionSet(DocumentdbInfoConfig.Documentdb config, LegacyEmulationConfig emulConfig) {
this.emulationConfig = emulConfig;
configure(config);
}
/** Returns a docsum definition by id
* @param id document summary class id
* @return a DocsumDefinition for the id, if found.
*/
public final DocsumDefinition getDocsumDefinition(long id) {
return definitions.get(new Long(id));
}
/**
* Returns a docsum definition by name, or null if not found
*
* @param name the name of the summary class to use, or null to use the name "default"
* @return the summary class found, or null if none
*/
public final DocsumDefinition getDocsumDefinition(String name) {
if (name == null)
name="default";
return definitionsByName.get(name);
}
/**
* Makes data available for decoding for the given hit.
*
* @param summaryClass the requested summary class
* @param data docsum data from backend
* @param hit the Hit corresponding to this document summary
* @throws ConfigurationException if the summary class of this hit is missing
*/
public final void lazyDecode(String summaryClass, byte[] data, FastHit hit) {
ByteBuffer buffer = ByteBuffer.wrap(data);
buffer.order(ByteOrder.LITTLE_ENDIAN);
long docsumClassId = buffer.getInt();
if (docsumClassId != SLIME_MAGIC_ID) {
log.warning("Only expecting SchemaLess docsums");
// TODO: Not used, remove - bratseth 2017-01-016
DocsumDefinition docsumDefinition = lookupDocsum(docsumClassId);
Docsum docsum = new Docsum(docsumDefinition, data);
hit.addSummary(docsum);
} else {
DocsumDefinition docsumDefinition = lookupDocsum(summaryClass);
Slime value = BinaryFormat.decode(buffer.array(), buffer.arrayOffset()+buffer.position(), buffer.remaining());
hit.addSummary(docsumDefinition, new SlimeAdapter(value.get()));
}
}
private DocsumDefinition lookupDocsum(long docsumClassId) {
DocsumDefinition docsumDefinition = getDocsumDefinition(docsumClassId);
if (docsumDefinition == null) {
throw new ConfigurationException("Received hit with summary id " + docsumClassId +
", but this summary class is not in current summary config (" + toString() + ")" +
" (that is, the system is in an inconsistent state)");
}
return docsumDefinition;
}
private DocsumDefinition lookupDocsum(String summaryClass) {
DocsumDefinition ds = definitionsByName.get(summaryClass);
if (ds == null) {
ds = definitionsByName.get("default");
}
if (ds == null) {
throw new ConfigurationException("Fetched hit with summary class " + summaryClass +
", but this summary class is not in current summary config (" + toString() + ")" +
" (that is, you asked for something unknown, and no default was found)");
}
return ds;
}
public String toString() {
StringBuilder sb = new StringBuilder();
Set<Map.Entry<Long, DocsumDefinition>> entrySet = definitions.entrySet();
boolean first = true;
for (Iterator<Map.Entry<Long, DocsumDefinition>> itr = entrySet.iterator(); itr.hasNext(); ) {
if (!first) {
sb.append(",");
} else {
first = false;
}
Map.Entry<Long, DocsumDefinition> entry = itr.next();
sb.append("[").append(entry.getKey()).append(",").append(entry.getValue().getName()).append("]");
}
return sb.toString();
}
public int size() {
return definitions.size();
}
private void configure(DocumentdbInfoConfig.Documentdb config) {
for (int i = 0; i < config.summaryclass().size(); ++i) {
DocumentdbInfoConfig.Documentdb.Summaryclass sc = config.summaryclass(i);
DocsumDefinition docSumDef = new DocsumDefinition(sc, emulationConfig);
definitions.put((long) sc.id(), docSumDef);
definitionsByName.put(sc.name(), docSumDef);
}
if (definitions.size() == 0) {
log.warning("No summary classes found in DocumentdbInfoConfig.Documentdb");
}
}
}
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