com.ibm.etcd.client.watch.EtcdWatchUpdate Maven / Gradle / Ivy

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etcd3 java client and utilities

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/*
 * Copyright 2017, 2018 IBM Corp. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy
 * of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package com.ibm.etcd.client.watch;

import java.util.List;
import java.util.stream.Collectors;

import com.google.protobuf.ByteString;
import com.ibm.etcd.client.kv.WatchUpdate;
import com.ibm.etcd.api.Event;
import com.ibm.etcd.api.KeyValue;
import com.ibm.etcd.api.ResponseHeader;
import com.ibm.etcd.api.WatchResponse;

/**
 * @see WatchUpdate
 */
final class EtcdWatchUpdate implements WatchUpdate {

    private final WatchResponse response;

    EtcdWatchUpdate(WatchResponse response) {
        this.response = response;
    }

    @Override
    public ResponseHeader getHeader() {
        return response.getHeader();
    }

    @Override
    public List getEvents() {
        return response.getEventsList();
    }

    @Override
    public String toString() {
        return "WatchUpdate[rev=" + response.getHeader().getRevision()
                + ",events=[" + getEvents().stream().map(e ->
                "Event[type=" + e.getType() + ",key=" + kvToString(e.getKv())
                + ",modRev=" + (e.getKv() != null ? e.getKv().getModRevision() : "n/a")
                + ",prevKey=" + kvToString(e.getPrevKv()) + "]")
                .collect(Collectors.joining(",")) + "]]";
    }

    private static String kvToString(KeyValue kv) {
        if (kv == null) {
            return null;
        }
        ByteString key = kv.getKey();
        return key != null ? key.toStringUtf8() : "null";
    }
}