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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.vespa.config;
import com.yahoo.vespa.config.protocol.Payload;
import com.yahoo.vespa.config.util.ConfigUtils;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Objects;
import java.util.stream.Collectors;
import static com.yahoo.vespa.config.PayloadChecksum.Type.MD5;
import static com.yahoo.vespa.config.PayloadChecksum.Type.XXHASH64;
/**
* Checksums for config payload, typically 1 for each PayloadChecksum type (md5 and xxhash64).
* Initialized with empty checksum for each existing type.
*
* @author hmusum
*/
public class PayloadChecksums {
private final Map<PayloadChecksum.Type, PayloadChecksum> checksums = new LinkedHashMap<>();
private PayloadChecksums() {
this(false);
}
private PayloadChecksums(boolean addEmptyChecksumForAllTypes) {
if (addEmptyChecksumForAllTypes)
Arrays.stream(PayloadChecksum.Type.values())
.forEach(type -> checksums.put(type, PayloadChecksum.empty(type)));
}
public static PayloadChecksums empty() { return new PayloadChecksums(true); }
public static PayloadChecksums from(PayloadChecksum... checksums) {
PayloadChecksums payloadChecksums = new PayloadChecksums();
Arrays.stream(checksums).filter(Objects::nonNull).forEach(payloadChecksums::add);
return payloadChecksums;
}
public static PayloadChecksums from(String configMd5, String configXxhash64) {
return new PayloadChecksums()
.add(new PayloadChecksum(configMd5, MD5))
.add(new PayloadChecksum(configXxhash64, XXHASH64));
}
public static PayloadChecksums fromPayload(Payload payload) {
return new PayloadChecksums()
.add(new PayloadChecksum(ConfigUtils.getMd5(payload.getData()), MD5))
.add(new PayloadChecksum(ConfigUtils.getXxhash64(payload.getData()), XXHASH64));
}
private PayloadChecksums add(PayloadChecksum checksum) {
checksums.put(checksum.type(), checksum);
return this;
}
public void removeChecksumsOfType(PayloadChecksum.Type type) { checksums.remove(type); }
public PayloadChecksum getForType(PayloadChecksum.Type type) {
return checksums.get(type);
}
public boolean valid() {
return checksums.values().stream().allMatch(PayloadChecksum::valid);
}
public boolean isEmpty() { return this.equals(empty()); }
public boolean matches(PayloadChecksums other) {
if (getForType(XXHASH64) != null) return getForType(XXHASH64).equals(other.getForType(XXHASH64));
if (getForType(MD5) != null) return getForType(MD5).equals(other.getForType(MD5));
return true;
}
@Override
public String toString() {
return checksums.values().stream()
.map(checksum -> checksum.type().name() + ":" + checksum.asString())
.collect(Collectors.joining(","));
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
PayloadChecksums that = (PayloadChecksums) o;
return Objects.equals(checksums, that.checksums);
}
@Override
public int hashCode() {
return Objects.hash(checksums);
}
}
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