Examples with Page org.h2.store.Page used on opensource projects

Example 21 with Page

use of org.h2.store.Page in project h2database by h2database.

the class Page method write.

/**
 * Store the page and update the position.
 *
 * @param chunk the chunk
 * @param buff the target buffer
 * @return the position of the buffer just after the type
 */
private int write(Chunk chunk, WriteBuffer buff) {
    int start = buff.position();
    int len = keys.length;
    int type = children != null ? DataUtils.PAGE_TYPE_NODE : DataUtils.PAGE_TYPE_LEAF;
    buff.putInt(0).putShort((byte) 0).putVarInt(map.getId()).putVarInt(len);
    int typePos = buff.position();
    buff.put((byte) type);
    if (type == DataUtils.PAGE_TYPE_NODE) {
        writeChildren(buff);
        for (int i = 0; i <= len; i++) {
            buff.putVarLong(children[i].count);
        }
    }
    int compressStart = buff.position();
    map.getKeyType().write(buff, keys, len, true);
    if (type == DataUtils.PAGE_TYPE_LEAF) {
        map.getValueType().write(buff, values, len, false);
    }
    MVStore store = map.getStore();
    int expLen = buff.position() - compressStart;
    if (expLen > 16) {
        int compressionLevel = store.getCompressionLevel();
        if (compressionLevel > 0) {
            Compressor compressor;
            int compressType;
            if (compressionLevel == 1) {
                compressor = map.getStore().getCompressorFast();
                compressType = DataUtils.PAGE_COMPRESSED;
            } else {
                compressor = map.getStore().getCompressorHigh();
                compressType = DataUtils.PAGE_COMPRESSED_HIGH;
            }
            byte[] exp = new byte[expLen];
            buff.position(compressStart).get(exp);
            byte[] comp = new byte[expLen * 2];
            int compLen = compressor.compress(exp, expLen, comp, 0);
            int plus = DataUtils.getVarIntLen(compLen - expLen);
            if (compLen + plus < expLen) {
                buff.position(typePos).put((byte) (type + compressType));
                buff.position(compressStart).putVarInt(expLen - compLen).put(comp, 0, compLen);
            }
        }
    }
    int pageLength = buff.position() - start;
    int chunkId = chunk.id;
    int check = DataUtils.getCheckValue(chunkId) ^ DataUtils.getCheckValue(start) ^ DataUtils.getCheckValue(pageLength);
    buff.putInt(start, pageLength).putShort(start + 4, (short) check);
    if (pos != 0) {
        throw DataUtils.newIllegalStateException(DataUtils.ERROR_INTERNAL, "Page already stored");
    }
    pos = DataUtils.getPagePos(chunkId, start, pageLength, type);
    store.cachePage(pos, this, getMemory());
    if (type == DataUtils.PAGE_TYPE_NODE) {
        // cache again - this will make sure nodes stays in the cache
        // for a longer time
        store.cachePage(pos, this, getMemory());
    }
    long max = DataUtils.getPageMaxLength(pos);
    chunk.maxLen += max;
    chunk.maxLenLive += max;
    chunk.pageCount++;
    chunk.pageCountLive++;
    if (removedInMemory) {
        // if the page was removed _before_ the position was assigned, we
        // need to mark it removed here, so the fields are updated
        // when the next chunk is stored
        map.removePage(pos, memory);
    }
    return typePos + 1;
}

Example 22 with Page

use of org.h2.store.Page in project h2database by h2database.

the class Page method setValue.

/**
 * Replace the value at an index in this page.
 *
 * @param index the index
 * @param value the new value
 * @return the old value
 */
public Object setValue(int index, Object value) {
    Object old = values[index];
    // this is slightly slower:
    // values = Arrays.copyOf(values, values.length);
    values = values.clone();
    DataType valueType = map.getValueType();
    if (isPersistent()) {
        addMemory(valueType.getMemory(value) - valueType.getMemory(old));
    }
    values[index] = value;
    return old;
}

Example 23 with Page

use of org.h2.store.Page in project h2database by h2database.

the class Page method setKey.

/**
 * Replace the key at an index in this page.
 *
 * @param index the index
 * @param key the new key
 */
public void setKey(int index, Object key) {
    // this is slightly slower:
    // keys = Arrays.copyOf(keys, keys.length);
    keys = keys.clone();
    if (isPersistent()) {
        Object old = keys[index];
        DataType keyType = map.getKeyType();
        int mem = keyType.getMemory(key);
        if (old != null) {
            mem -= keyType.getMemory(old);
        }
        addMemory(mem);
    }
    keys[index] = key;
}

Example 24 with Page

use of org.h2.store.Page in project h2database by h2database.

the class TestDataPage method testAll.

private void testAll() {
    Data page = Data.create(this, 128);
    char[] data = new char[0x10000];
    for (int i = 0; i < data.length; i++) {
        data[i] = (char) i;
    }
    String s = new String(data);
    page.checkCapacity(s.length() * 4);
    page.writeString(s);
    int len = page.length();
    assertEquals(len, Data.getStringLen(s));
    page.reset();
    assertEquals(s, page.readString());
    page.reset();
    page.writeString("H\u1111!");
    page.writeString("John\tBrack's \"how are you\" M\u1111ller");
    page.writeValue(ValueInt.get(10));
    page.writeValue(ValueString.get("test"));
    page.writeValue(ValueFloat.get(-2.25f));
    page.writeValue(ValueDouble.get(10.40));
    page.writeValue(ValueNull.INSTANCE);
    trace(new String(page.getBytes()));
    page.reset();
    trace(page.readString());
    trace(page.readString());
    trace(page.readValue().getInt());
    trace(page.readValue().getString());
    trace("" + page.readValue().getFloat());
    trace("" + page.readValue().getDouble());
    trace(page.readValue().toString());
    page.reset();
    page.writeInt(0);
    page.writeInt(Integer.MAX_VALUE);
    page.writeInt(Integer.MIN_VALUE);
    page.writeInt(1);
    page.writeInt(-1);
    page.writeInt(1234567890);
    page.writeInt(54321);
    trace(new String(page.getBytes()));
    page.reset();
    trace(page.readInt());
    trace(page.readInt());
    trace(page.readInt());
    trace(page.readInt());
    trace(page.readInt());
    trace(page.readInt());
    trace(page.readInt());
    page = null;
}

Example 25 with Page

use of org.h2.store.Page in project h2database by h2database.

the class TestAll method run.

private static void run(String... args) throws Exception {
    SelfDestructor.startCountdown(4 * 60);
    long time = System.nanoTime();
    printSystemInfo();
    // use lower values, to better test those cases,
    // and (for delays) to speed up the tests
    System.setProperty("h2.maxMemoryRows", "100");
    System.setProperty("h2.check2", "true");
    System.setProperty("h2.delayWrongPasswordMin", "0");
    System.setProperty("h2.delayWrongPasswordMax", "0");
    System.setProperty("h2.useThreadContextClassLoader", "true");
    // System.setProperty("h2.modifyOnWrite", "true");
    // speedup
    // System.setProperty("h2.syncMethod", "");
    /*

recovery tests with small freeList pages, page size 64

reopen org.h2.test.unit.TestPageStore
-Xmx1500m -D reopenOffset=3 -D reopenShift=1

power failure test
power failure test: MULTI_THREADED=TRUE
power failure test: larger binaries and additional index.
power failure test with randomly generating / dropping indexes and tables.

drop table test;
create table test(id identity, name varchar(100) default space(100));
@LOOP 10 insert into test select null, null from system_range(1, 100000);
delete from test;

documentation: review package and class level javadocs
documentation: rolling review at main.html

-------------

remove old TODO, move to roadmap

kill a test:
kill -9 `jps -l | grep "org.h2.test." | cut -d " " -f 1`

*/
    TestAll test = new TestAll();
    if (args.length > 0) {
        if ("travis".equals(args[0])) {
            test.travis = true;
            test.testAll();
        } else if ("vmlens".equals(args[0])) {
            test.vmlens = true;
            test.testAll();
        } else if ("reopen".equals(args[0])) {
            System.setProperty("h2.delayWrongPasswordMin", "0");
            System.setProperty("h2.check2", "false");
            System.setProperty("h2.analyzeAuto", "100");
            System.setProperty("h2.pageSize", "64");
            System.setProperty("h2.reopenShift", "5");
            FilePathRec.register();
            test.reopen = true;
            TestReopen reopen = new TestReopen();
            reopen.init();
            FilePathRec.setRecorder(reopen);
            test.runTests();
        } else if ("crash".equals(args[0])) {
            test.endless = true;
            new TestCrashAPI().runTest(test);
        } else if ("synth".equals(args[0])) {
            new TestSynth().runTest(test);
        } else if ("kill".equals(args[0])) {
            new TestKill().runTest(test);
        } else if ("random".equals(args[0])) {
            test.endless = true;
            new TestRandomSQL().runTest(test);
        } else if ("join".equals(args[0])) {
            new TestJoin().runTest(test);
            test.endless = true;
        } else if ("btree".equals(args[0])) {
            new TestBtreeIndex().runTest(test);
        } else if ("all".equals(args[0])) {
            test.testEverything();
        } else if ("codeCoverage".equals(args[0])) {
            test.codeCoverage = true;
            test.runCoverage();
        } else if ("multiThread".equals(args[0])) {
            new TestMulti().runTest(test);
        } else if ("halt".equals(args[0])) {
            new TestHaltApp().runTest(test);
        } else if ("timer".equals(args[0])) {
            new TestTimer().runTest(test);
        }
    } else {
        test.testAll();
    }
    System.out.println(TestBase.formatTime(TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - time)) + " total");
}