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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.logging;
import com.yahoo.collections.ListMap;
import com.yahoo.yolean.trace.TraceNode;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.function.Function;
import static java.util.stream.Collectors.toMap;
/**
* <p>Information to be logged in the access log.</p>
*
* <p>This class contains the union of all information that can be
* logged with all the supported access log formats.</p>
*
* <p>The add methods can be called multiple times,
* but the parameters should be different for each
* invocation of the same method.</p>
*
* This class is thread-safe.
*
* @author Tony Vaagenes
* @author bakksjo
* @author bjorncs
*/
public class AccessLogEntry {
private final Object monitor = new Object();
private HitCounts hitCounts;
private TraceNode traceNode;
private ListMap<String,String> keyValues=null;
public void setHitCounts(final HitCounts hitCounts) {
synchronized (monitor) {
requireNull(this.hitCounts);
this.hitCounts = hitCounts;
}
}
public HitCounts getHitCounts() {
synchronized (monitor) {
return hitCounts;
}
}
public void addKeyValue(String key,String value) {
synchronized (monitor) {
if (keyValues == null) {
keyValues = new ListMap<>();
}
keyValues.put(key,value);
}
}
public Map<String, List<String>> getKeyValues() {
synchronized (monitor) {
if (keyValues == null) {
return null;
}
Map<String, List<String>> newMapWithImmutableValues = mapValues(
keyValues.entrySet(),
valueList -> Collections.unmodifiableList(new ArrayList<>(valueList)));
return Collections.unmodifiableMap(newMapWithImmutableValues);
}
}
private static <K, V1, V2> Map<K, V2> mapValues(Set<Map.Entry<K, V1>> entrySet, Function<V1, V2> valueConverter) {
return entrySet.stream()
.collect(toMap(
entry -> entry.getKey(),
entry -> valueConverter.apply(entry.getValue())));
}
public void setTrace(TraceNode traceNode) {
synchronized (monitor) {
requireNull(this.traceNode);
this.traceNode = traceNode;
}
}
public TraceNode getTrace() {
synchronized (monitor) {
return traceNode;
}
}
@Override
public String toString() {
return "AccessLogEntry{" +
"hitCounts=" + hitCounts +
", traceNode=" + traceNode +
", keyValues=" + keyValues +
'}';
}
private static void requireNull(final Object value) {
if (value != null) {
throw new IllegalStateException("Attempt to overwrite field that has been assigned. Value: " + value);
}
}
}
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