org.apache.bookkeeper.client.PulsarMockLedgerHandle.java Source code

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.bookkeeper.client;

import com.google.common.collect.Lists;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;

import java.security.GeneralSecurityException;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.EnumSet;
import java.util.Enumeration;
import java.util.List;
import java.util.Queue;
import java.util.concurrent.CompletableFuture;

import org.apache.bookkeeper.client.AsyncCallback.AddCallback;
import org.apache.bookkeeper.client.AsyncCallback.CloseCallback;
import org.apache.bookkeeper.client.AsyncCallback.ReadCallback;
import org.apache.bookkeeper.client.BookKeeper.DigestType;
import org.apache.bookkeeper.client.api.LastConfirmedAndEntry;
import org.apache.bookkeeper.client.api.LedgerEntries;
import org.apache.bookkeeper.client.api.LedgerMetadata;
import org.apache.bookkeeper.client.api.ReadHandle;
import org.apache.bookkeeper.client.api.WriteFlag;
import org.apache.bookkeeper.client.impl.LedgerEntryImpl;
import org.apache.bookkeeper.common.concurrent.FutureUtils;
import org.apache.bookkeeper.net.BookieSocketAddress;
import org.apache.bookkeeper.versioning.LongVersion;
import org.apache.bookkeeper.versioning.Versioned;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Mock BK {@link LedgerHandle}. Used by {@link PulsarMockBookKeeper}.
 */
public class PulsarMockLedgerHandle extends LedgerHandle {

    final ArrayList<LedgerEntryImpl> entries = Lists.newArrayList();
    final PulsarMockBookKeeper bk;
    final long id;
    final DigestType digest;
    final byte[] passwd;
    final ReadHandle readHandle;
    long lastEntry = -1;
    boolean fenced = false;

    public PulsarMockLedgerHandle(PulsarMockBookKeeper bk, long id, DigestType digest, byte[] passwd)
            throws GeneralSecurityException {
        super(bk.getClientCtx(), id, new Versioned<>(createMetadata(digest, passwd), new LongVersion(0L)), digest,
                passwd, WriteFlag.NONE);
        this.bk = bk;
        this.id = id;
        this.digest = digest;
        this.passwd = Arrays.copyOf(passwd, passwd.length);

        readHandle = new PulsarMockReadHandle(bk, id, getLedgerMetadata(), entries);
    }

    @Override
    public void asyncClose(CloseCallback cb, Object ctx) {
        bk.getProgrammedFailure().thenComposeAsync((res) -> {
            fenced = true;

            Versioned<LedgerMetadata> current = getVersionedLedgerMetadata();
            Versioned<LedgerMetadata> newMetadata = new Versioned<>(
                    LedgerMetadataBuilder.from(current.getValue()).withClosedState()
                            .withLastEntryId(getLastAddConfirmed()).withLength(getLength()).build(),
                    new LongVersion(((LongVersion) current.getVersion()).getLongVersion() + 1));
            setLedgerMetadata(current, newMetadata);
            return FutureUtils.value(null);
        }, bk.executor).whenCompleteAsync((res, exception) -> {
            if (exception != null) {
                cb.closeComplete(PulsarMockBookKeeper.getExceptionCode(exception), null, ctx);
            } else {
                cb.closeComplete(BKException.Code.OK, this, ctx);
            }
        }, bk.executor);
    }

    @Override
    public void asyncReadEntries(final long firstEntry, final long lastEntry, final ReadCallback cb,
            final Object ctx) {
        bk.getProgrammedFailure().thenComposeAsync((res) -> {
            log.debug("readEntries: first={} last={} total={}", firstEntry, lastEntry, entries.size());
            final Queue<LedgerEntry> seq = new ArrayDeque<LedgerEntry>();
            long entryId = firstEntry;
            while (entryId <= lastEntry && entryId < entries.size()) {
                seq.add(new LedgerEntry(entries.get((int) entryId++).duplicate()));
            }

            log.debug("Entries read: {}", seq);

            try {
                Thread.sleep(1);
            } catch (InterruptedException e) {
            }

            Enumeration<LedgerEntry> entries = new Enumeration<LedgerEntry>() {
                @Override
                public boolean hasMoreElements() {
                    return !seq.isEmpty();
                }

                @Override
                public LedgerEntry nextElement() {
                    return seq.remove();
                }
            };
            return FutureUtils.value(entries);
        }).whenCompleteAsync((res, exception) -> {
            if (exception != null) {
                cb.readComplete(PulsarMockBookKeeper.getExceptionCode(exception), PulsarMockLedgerHandle.this, null,
                        ctx);
            } else {
                cb.readComplete(BKException.Code.OK, PulsarMockLedgerHandle.this, res, ctx);
            }
        }, bk.executor);
    }

    @Override
    public long addEntry(byte[] data) throws InterruptedException, BKException {
        try {
            bk.checkProgrammedFail();
        } catch (BKException e) {
            fenced = true;
            throw e;
        }

        if (fenced) {
            throw BKException.create(BKException.Code.LedgerFencedException);
        }

        lastEntry = entries.size();
        entries.add(LedgerEntryImpl.create(ledgerId, lastEntry, data.length, Unpooled.wrappedBuffer(data)));
        return lastEntry;
    }

    @Override
    public void asyncAddEntry(final byte[] data, final AddCallback cb, final Object ctx) {
        asyncAddEntry(data, 0, data.length, cb, ctx);
    }

    @Override
    public void asyncAddEntry(final byte[] data, final int offset, final int length, final AddCallback cb,
            final Object ctx) {
        asyncAddEntry(Unpooled.wrappedBuffer(data, offset, length), cb, ctx);
    }

    @Override
    public void asyncAddEntry(final ByteBuf data, final AddCallback cb, final Object ctx) {
        data.retain();
        bk.getProgrammedFailure().thenComposeAsync((res) -> {
            try {
                Thread.sleep(1);
            } catch (InterruptedException e) {
            }

            if (fenced) {
                return FutureUtils.exception(new BKException.BKLedgerFencedException());
            } else {
                lastEntry = entries.size();
                byte[] storedData = new byte[data.readableBytes()];
                data.readBytes(storedData);
                entries.add(LedgerEntryImpl.create(ledgerId, lastEntry, storedData.length,
                        Unpooled.wrappedBuffer(storedData)));
                return FutureUtils.value(lastEntry);
            }

        }, bk.executor).whenCompleteAsync((entryId, exception) -> {
            data.release();
            if (exception != null) {
                fenced = true;
                cb.addComplete(PulsarMockBookKeeper.getExceptionCode(exception), PulsarMockLedgerHandle.this,
                        INVALID_ENTRY_ID, ctx);
            } else {
                cb.addComplete(BKException.Code.OK, PulsarMockLedgerHandle.this, entryId, ctx);
            }
        }, bk.executor);
    }

    @Override
    public long getId() {
        return ledgerId;
    }

    @Override
    public long getLastAddConfirmed() {
        if (bk.checkReturnEmptyLedger()) {
            return -1;
        } else {
            return lastEntry;
        }
    }

    @Override
    public long getLength() {
        long length = 0;
        for (LedgerEntryImpl entry : entries) {
            length += entry.getLength();
        }

        return length;
    }

    // ReadHandle interface
    @Override
    public CompletableFuture<LedgerEntries> readAsync(long firstEntry, long lastEntry) {
        return readHandle.readAsync(firstEntry, lastEntry);
    }

    @Override
    public CompletableFuture<LedgerEntries> readUnconfirmedAsync(long firstEntry, long lastEntry) {
        return readHandle.readUnconfirmedAsync(firstEntry, lastEntry);
    }

    @Override
    public CompletableFuture<Long> readLastAddConfirmedAsync() {
        return readHandle.readLastAddConfirmedAsync();
    }

    @Override
    public CompletableFuture<Long> tryReadLastAddConfirmedAsync() {
        return readHandle.tryReadLastAddConfirmedAsync();
    }

    @Override
    public boolean isClosed() {
        return readHandle.isClosed();
    }

    @Override
    public CompletableFuture<LastConfirmedAndEntry> readLastAddConfirmedAndEntryAsync(long entryId,
            long timeOutInMillis, boolean parallel) {
        return readHandle.readLastAddConfirmedAndEntryAsync(entryId, timeOutInMillis, parallel);
    }

    private static LedgerMetadata createMetadata(DigestType digest, byte[] passwd) {
        List<BookieSocketAddress> ensemble = Lists.newArrayList(new BookieSocketAddress("192.0.2.1", 1234),
                new BookieSocketAddress("192.0.2.2", 1234), new BookieSocketAddress("192.0.2.3", 1234));
        return LedgerMetadataBuilder.create().withDigestType(digest.toApiDigestType()).withPassword(passwd)
                .newEnsembleEntry(0L, ensemble).build();
    }

    private static final Logger log = LoggerFactory.getLogger(PulsarMockLedgerHandle.class);

}