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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.logging;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Deque;
import java.util.List;
/**
* This class keeps some information from the access log from the requests in memory. It is thread-safe.
*
* @author dybis
*/
public class CircularArrayAccessLogKeeper {
public static final int SIZE = 1000;
private final Deque<String> uris = new ArrayDeque<>(SIZE);
private final Object monitor = new Object();
/**
* This class is intended to be used with injection so it can be shared between other classes.
*/
public CircularArrayAccessLogKeeper() {}
/**
* Creates a list of Uris.
* @return URIs as string
*/
public List<String> getUris() {
final List<String> uriList = new ArrayList<>();
synchronized (monitor) {
uris.iterator().forEachRemaining(uri -> uriList.add(uri));
}
return uriList;
}
/**
* Add a new URI. It might remove an old entry to make space for new entry.
* @param uri uri as string
*/
public void addUri(String uri) {
synchronized (monitor) {
if (uris.size() == SIZE) {
uris.pop();
}
uris.add(uri);
}
}
}
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