/**
* Basic reference counter implementation that uses a Guava WeakInterner instance to manage
* instances of the counter.
*
* <p>Calling acquire(V) returns the interned copy of the val object. Objects used need to properly
* adhere to provide override impls of equals and hashcode to ensure they'll be interned properly.
*
* <p>Calling release releases the interned object and decrements the reference counter.
*/
public final class ReferenceCounter<V> {
private final Monitor monitor = new Monitor();
private final Interner<CountingReference<V>> interner = Interners.newWeakInterner();
private CountingReference<V> intern(V s) {
return interner.intern(ref(s));
}
public CountingReference<V> acquire(V val) {
monitor.enter();
try {
return intern(val).increment();
} finally {
monitor.leave();
}
}
public void release(V val) {
monitor.enter();
try {
intern(val).decrement();
} finally {
monitor.leave();
}
}
}
/** Functionality to deserialize loaded packages. */
public class PackageDeserializer {
private static final Logger LOG = Logger.getLogger(PackageDeserializer.class.getName());
/** Provides the deserializer with tools it needs to build a package from its serialized form. */
public interface PackageDeserializationEnvironment {
/** Converts the serialized package's path string into a {@link Path} object. */
Path getPath(String buildFilePath);
/** Returns a {@link RuleClass} object for the serialized rule. */
RuleClass getRuleClass(Build.Rule rulePb, Location ruleLocation);
/** Description of what rule attributes of each rule should be deserialized. */
AttributesToDeserialize attributesToDeserialize();
}
/**
* A class that defines what attributes to keep after deserialization. Note that all attributes of
* type label are kept in order to navigate between dependencies.
*
* <p>If {@code addSyntheticAttributeHash} is {@code true}, a synthetic attribute is added to each
* Rule that contains a stable hash of the entire serialized rule for the sake of permitting
* equality comparisons that respect the attributes that were dropped according to {@code
* attributesToKeep}.
*/
public static class AttributesToDeserialize {
private final boolean addSyntheticAttributeHash;
private final Predicate<String> shouldKeepAttributeWithName;
public AttributesToDeserialize(
boolean addSyntheticAttributeHash, Predicate<String> shouldKeepAttributeWithName) {
this.addSyntheticAttributeHash = addSyntheticAttributeHash;
this.shouldKeepAttributeWithName = shouldKeepAttributeWithName;
}
public boolean includeAttribute(String attr) {
return shouldKeepAttributeWithName.apply(attr);
}
}
public static final AttributesToDeserialize DESERIALIZE_ALL_ATTRS =
new AttributesToDeserialize(false, Predicates.<String>alwaysTrue());
// Workaround for Java serialization making it tough to pass in a deserialization environment
// manually.
// volatile is needed to ensure that the objects are published safely.
// TODO(bazel-team): Subclass ObjectOutputStream to pass this through instead.
public static volatile PackageDeserializationEnvironment defaultPackageDeserializationEnvironment;
// Cache label deserialization across all instances- PackgeDeserializers need to be created on
// demand due to initialiation constraints wrt the setting of static members.
private static final Interner<Label> LABEL_INTERNER = Interners.newWeakInterner();
/** Class encapsulating state for a single package deserialization. */
private static class DeserializationContext {
private final Package.Builder packageBuilder;
private DeserializationContext(Package.Builder packageBuilder) {
this.packageBuilder = packageBuilder;
}
}
private final PackageDeserializationEnvironment packageDeserializationEnvironment;
/**
* Creates a {@link PackageDeserializer} using {@link #defaultPackageDeserializationEnvironment}.
*/
public PackageDeserializer() {
this.packageDeserializationEnvironment = defaultPackageDeserializationEnvironment;
}
public PackageDeserializer(PackageDeserializationEnvironment packageDeserializationEnvironment) {
this.packageDeserializationEnvironment =
Preconditions.checkNotNull(packageDeserializationEnvironment);
}
private static ParsedAttributeValue deserializeAttribute(
Type<?> expectedType, Build.Attribute attrPb) throws PackageDeserializationException {
Object value = deserializeAttributeValue(expectedType, attrPb);
return new ParsedAttributeValue(
attrPb.hasExplicitlySpecified() && attrPb.getExplicitlySpecified(), value);
}
private static void deserializeInputFile(
DeserializationContext context, Build.SourceFile sourceFile)
throws PackageDeserializationException {
InputFile inputFile;
try {
inputFile =
context.packageBuilder.createInputFile(
deserializeLabel(sourceFile.getName()).getName(), EmptyLocation.INSTANCE);
} catch (GeneratedLabelConflict e) {
throw new PackageDeserializationException(e);
}
if (!sourceFile.getVisibilityLabelList().isEmpty() || sourceFile.hasLicense()) {
context.packageBuilder.setVisibilityAndLicense(
inputFile,
PackageFactory.getVisibility(deserializeLabels(sourceFile.getVisibilityLabelList())),
deserializeLicense(sourceFile.getLicense()));
}
}
private static void deserializePackageGroup(
DeserializationContext context, Build.PackageGroup packageGroupPb)
throws PackageDeserializationException {
List<String> specifications = new ArrayList<>();
for (String containedPackage : packageGroupPb.getContainedPackageList()) {
specifications.add("//" + containedPackage);
}
try {
context.packageBuilder.addPackageGroup(
deserializeLabel(packageGroupPb.getName()).getName(),
specifications,
deserializeLabels(packageGroupPb.getIncludedPackageGroupList()),
NullEventHandler.INSTANCE, // TODO(bazel-team): Handle errors properly
EmptyLocation.INSTANCE);
} catch (LabelSyntaxException | Package.NameConflictException e) {
throw new PackageDeserializationException(e);
}
}
private void deserializeRule(DeserializationContext context, Build.Rule rulePb)
throws PackageDeserializationException, InterruptedException {
Location ruleLocation = EmptyLocation.INSTANCE;
RuleClass ruleClass = packageDeserializationEnvironment.getRuleClass(rulePb, ruleLocation);
Map<String, ParsedAttributeValue> attributeValues = new HashMap<>();
AttributesToDeserialize attrToDeserialize =
packageDeserializationEnvironment.attributesToDeserialize();
Hasher hasher = Hashing.md5().newHasher();
for (Build.Attribute attrPb : rulePb.getAttributeList()) {
Type<?> type = ruleClass.getAttributeByName(attrPb.getName()).getType();
attributeValues.put(attrPb.getName(), deserializeAttribute(type, attrPb));
if (attrToDeserialize.addSyntheticAttributeHash) {
// TODO(bazel-team): This might give false positives because of explicit vs implicit.
hasher.putBytes(attrPb.toByteArray());
}
}
AttributeContainerWithoutLocation attributeContainer =
new AttributeContainerWithoutLocation(ruleClass, hasher.hash());
Label ruleLabel = deserializeLabel(rulePb.getName());
try {
Rule rule =
createRuleWithParsedAttributeValues(
ruleClass,
ruleLabel,
context.packageBuilder,
ruleLocation,
attributeValues,
NullEventHandler.INSTANCE,
attributeContainer);
context.packageBuilder.addRule(rule);
// Remove the attribute after it is added to package in order to pass the validations
// and be able to compute all the outputs.
if (attrToDeserialize != DESERIALIZE_ALL_ATTRS) {
for (String attrName : attributeValues.keySet()) {
Attribute attribute = ruleClass.getAttributeByName(attrName);
if (!(attrToDeserialize.shouldKeepAttributeWithName.apply(attrName)
|| BuildType.isLabelType(attribute.getType()))) {
attributeContainer.clearIfNotLabel(attrName);
}
}
}
Preconditions.checkState(!rule.containsErrors());
} catch (NameConflictException | LabelSyntaxException e) {
throw new PackageDeserializationException(e);
}
}
/** "Empty" location implementation, all methods should return non-null, but empty, values. */
private static class EmptyLocation extends Location {
private static final EmptyLocation INSTANCE = new EmptyLocation();
private static final PathFragment DEV_NULL = new PathFragment("/dev/null");
private static final LineAndColumn EMPTY_LINE_AND_COLUMN = new LineAndColumn(0, 0);
private EmptyLocation() {
super(0, 0);
}
@Override
public PathFragment getPath() {
return DEV_NULL;
}
@Override
public LineAndColumn getStartLineAndColumn() {
return EMPTY_LINE_AND_COLUMN;
}
@Override
public LineAndColumn getEndLineAndColumn() {
return EMPTY_LINE_AND_COLUMN;
}
@Override
public int hashCode() {
return 42;
}
@Override
public boolean equals(Object other) {
return other instanceof EmptyLocation;
}
}
/** Exception thrown when something goes wrong during package deserialization. */
public static class PackageDeserializationException extends Exception {
private PackageDeserializationException(String message) {
super(message);
}
private PackageDeserializationException(String message, Exception reason) {
super(message, reason);
}
private PackageDeserializationException(Exception reason) {
super(reason);
}
}
private static Label deserializeLabel(String labelName) throws PackageDeserializationException {
try {
return LABEL_INTERNER.intern(Label.parseAbsolute(labelName));
} catch (LabelSyntaxException e) {
throw new PackageDeserializationException(
"Invalid label '" + labelName + "':" + e.getMessage(), e);
}
}
private static List<Label> deserializeLabels(List<String> labelNames)
throws PackageDeserializationException {
ImmutableList.Builder<Label> result = ImmutableList.builder();
for (String labelName : labelNames) {
result.add(deserializeLabel(labelName));
}
return result.build();
}
private static License deserializeLicense(Build.License licensePb)
throws PackageDeserializationException {
List<String> licenseStrings = new ArrayList<>();
licenseStrings.addAll(licensePb.getLicenseTypeList());
for (String exception : licensePb.getExceptionList()) {
licenseStrings.add("exception=" + exception);
}
try {
return License.parseLicense(licenseStrings);
} catch (LicenseParsingException e) {
throw new PackageDeserializationException(e);
}
}
private static Set<DistributionType> deserializeDistribs(List<String> distributions)
throws PackageDeserializationException {
try {
return License.parseDistributions(distributions);
} catch (LicenseParsingException e) {
throw new PackageDeserializationException(e);
}
}
private static TriState deserializeTriStateValue(String value)
throws PackageDeserializationException {
if (value.equals("yes")) {
return TriState.YES;
} else if (value.equals("no")) {
return TriState.NO;
} else if (value.equals("auto")) {
return TriState.AUTO;
} else {
throw new PackageDeserializationException(
String.format("Invalid tristate value: '%s'", value));
}
}
private static List<FilesetEntry> deserializeFilesetEntries(List<Build.FilesetEntry> filesetPbs)
throws PackageDeserializationException {
ImmutableList.Builder<FilesetEntry> result = ImmutableList.builder();
for (Build.FilesetEntry filesetPb : filesetPbs) {
Label srcLabel = deserializeLabel(filesetPb.getSource());
List<Label> files =
filesetPb.getFilesPresent() ? deserializeLabels(filesetPb.getFileList()) : null;
List<String> excludes =
filesetPb.getExcludeList().isEmpty()
? null
: ImmutableList.copyOf(filesetPb.getExcludeList());
String destDir = filesetPb.getDestinationDirectory();
FilesetEntry.SymlinkBehavior symlinkBehavior =
pbToSymlinkBehavior(filesetPb.getSymlinkBehavior());
String stripPrefix = filesetPb.hasStripPrefix() ? filesetPb.getStripPrefix() : null;
result.add(
new FilesetEntry(srcLabel, files, excludes, destDir, symlinkBehavior, stripPrefix));
}
return result.build();
}
/**
* Deserialize a package from its representation as a protocol message. The inverse of {@link
* PackageSerializer#serialize}.
*
* @throws IOException
* @throws InterruptedException
*/
private void deserializeInternal(
Build.Package packagePb,
StoredEventHandler eventHandler,
Package.Builder builder,
InputStream in)
throws PackageDeserializationException, IOException, InterruptedException {
Path buildFile = packageDeserializationEnvironment.getPath(packagePb.getBuildFilePath());
Preconditions.checkNotNull(buildFile);
DeserializationContext context = new DeserializationContext(builder);
builder.setFilename(buildFile);
if (packagePb.hasDefaultVisibilitySet() && packagePb.getDefaultVisibilitySet()) {
builder.setDefaultVisibility(
PackageFactory.getVisibility(
deserializeLabels(packagePb.getDefaultVisibilityLabelList())));
}
// It's important to do this after setting the default visibility, since that implicitly sets
// this bit to true
builder.setDefaultVisibilitySet(packagePb.getDefaultVisibilitySet());
if (packagePb.hasDefaultTestonly()) {
builder.setDefaultTestonly(packagePb.getDefaultTestonly());
}
if (packagePb.hasDefaultDeprecation()) {
builder.setDefaultDeprecation(packagePb.getDefaultDeprecation());
}
builder.setDefaultCopts(packagePb.getDefaultCoptList());
if (packagePb.hasDefaultHdrsCheck()) {
builder.setDefaultHdrsCheck(packagePb.getDefaultHdrsCheck());
}
if (packagePb.hasDefaultLicense()) {
builder.setDefaultLicense(deserializeLicense(packagePb.getDefaultLicense()));
}
builder.setDefaultDistribs(deserializeDistribs(packagePb.getDefaultDistribList()));
for (String subinclude : packagePb.getSubincludeLabelList()) {
Label label = deserializeLabel(subinclude);
builder.addSubinclude(label, null);
}
ImmutableList.Builder<Label> skylarkFileDependencies = ImmutableList.builder();
for (String skylarkFile : packagePb.getSkylarkLabelList()) {
skylarkFileDependencies.add(deserializeLabel(skylarkFile));
}
builder.setSkylarkFileDependencies(skylarkFileDependencies.build());
MakeEnvironment.Builder makeEnvBuilder = new MakeEnvironment.Builder();
for (Build.MakeVar makeVar : packagePb.getMakeVariableList()) {
for (Build.MakeVarBinding binding : makeVar.getBindingList()) {
makeEnvBuilder.update(
makeVar.getName(), binding.getValue(), binding.getPlatformSetRegexp());
}
}
builder.setMakeEnv(makeEnvBuilder);
for (Build.Event event : packagePb.getEventList()) {
deserializeEvent(eventHandler, event);
}
if (packagePb.hasContainsErrors() && packagePb.getContainsErrors()) {
builder.setContainsErrors();
}
builder.setWorkspaceName(packagePb.getWorkspaceName());
deserializeTargets(in, context);
}
private void deserializeTargets(InputStream in, DeserializationContext context)
throws IOException, PackageDeserializationException, InterruptedException {
Build.TargetOrTerminator tot;
while (!(tot = Build.TargetOrTerminator.parseDelimitedFrom(in)).getIsTerminator()) {
Build.Target target = tot.getTarget();
switch (target.getType()) {
case SOURCE_FILE:
deserializeInputFile(context, target.getSourceFile());
break;
case PACKAGE_GROUP:
deserializePackageGroup(context, target.getPackageGroup());
break;
case RULE:
deserializeRule(context, target.getRule());
break;
default:
throw new IllegalStateException("Unexpected Target type: " + target.getType());
}
}
}
/**
* Deserializes a {@link Package} from {@code in}. The inverse of {@link
* PackageSerializer#serialize}.
*
* <p>Expects {@code in} to contain a single {@link
* com.google.devtools.build.lib.query2.proto.proto2api.Build.Package} message followed by a
* series of {@link com.google.devtools.build.lib.query2.proto.proto2api.Build.TargetOrTerminator}
* messages encoding the associated targets.
*
* @param in stream to read from
* @return a new {@link Package} as read from {@code in}
* @throws PackageDeserializationException on failures deserializing the input
* @throws IOException on failures reading from {@code in}
* @throws InterruptedException
*/
public Package deserialize(InputStream in)
throws PackageDeserializationException, IOException, InterruptedException {
try {
return deserializeInternal(in);
} catch (PackageDeserializationException | RuntimeException e) {
LOG.log(Level.WARNING, "Failed to deserialize Package object", e);
throw e;
}
}
private Package deserializeInternal(InputStream in)
throws PackageDeserializationException, IOException, InterruptedException {
// Read the initial Package message so we have the data to initialize the builder. We will read
// the Targets in individually later.
Build.Package packagePb = Build.Package.parseDelimitedFrom(in);
Package.Builder builder;
try {
builder =
new Package.Builder(
PackageIdentifier.create(
packagePb.getRepository(), new PathFragment(packagePb.getName())),
null);
} catch (LabelSyntaxException e) {
throw new PackageDeserializationException(e);
}
StoredEventHandler eventHandler = new StoredEventHandler();
deserializeInternal(packagePb, eventHandler, builder, in);
builder.addEvents(eventHandler.getEvents());
return builder.build();
}
private static void deserializeEvent(StoredEventHandler eventHandler, Build.Event event) {
String message = event.getMessage();
switch (event.getKind()) {
case ERROR:
eventHandler.handle(Event.error(message));
break;
case WARNING:
eventHandler.handle(Event.warn(message));
break;
case INFO:
eventHandler.handle(Event.info(message));
break;
case PROGRESS:
eventHandler.handle(Event.progress(message));
break;
default:
break; // Ignore
}
}
private static List<?> deserializeGlobs(List<?> matches, Build.Attribute attrPb) {
if (attrPb.getGlobCriteriaCount() == 0) {
return matches;
}
Builder<GlobCriteria> criteriaBuilder = ImmutableList.builder();
for (Build.GlobCriteria criteriaPb : attrPb.getGlobCriteriaList()) {
if (criteriaPb.hasGlob() && criteriaPb.getGlob()) {
criteriaBuilder.add(
GlobCriteria.fromGlobCall(
ImmutableList.copyOf(criteriaPb.getIncludeList()),
ImmutableList.copyOf(criteriaPb.getExcludeList())));
} else {
criteriaBuilder.add(
GlobCriteria.fromList(ImmutableList.copyOf(criteriaPb.getIncludeList())));
}
}
@SuppressWarnings({"unchecked", "rawtypes"})
GlobList<?> result = new GlobList(criteriaBuilder.build(), matches);
return result;
}
// TODO(bazel-team): Verify that these put sane values in the attribute
@VisibleForTesting
static Object deserializeAttributeValue(Type<?> expectedType, Build.Attribute attrPb)
throws PackageDeserializationException {
switch (attrPb.getType()) {
case INTEGER:
return attrPb.hasIntValue() ? new Integer(attrPb.getIntValue()) : null;
case STRING:
if (!attrPb.hasStringValue()) {
return null;
} else if (expectedType == BuildType.NODEP_LABEL) {
return deserializeLabel(attrPb.getStringValue());
} else {
return attrPb.getStringValue();
}
case LABEL:
case OUTPUT:
return attrPb.hasStringValue() ? deserializeLabel(attrPb.getStringValue()) : null;
case STRING_LIST:
if (expectedType == BuildType.NODEP_LABEL_LIST) {
return deserializeGlobs(deserializeLabels(attrPb.getStringListValueList()), attrPb);
} else {
return deserializeGlobs(ImmutableList.copyOf(attrPb.getStringListValueList()), attrPb);
}
case LABEL_LIST:
case OUTPUT_LIST:
return deserializeGlobs(deserializeLabels(attrPb.getStringListValueList()), attrPb);
case DISTRIBUTION_SET:
return deserializeDistribs(attrPb.getStringListValueList());
case LICENSE:
return attrPb.hasLicense() ? deserializeLicense(attrPb.getLicense()) : null;
case STRING_DICT:
{
// Building an immutable map will fail if the builder was given duplicate keys. These
// entry
// lists may contain duplicate keys if the serialized map value was configured (e.g. via
// the select function) and the different configuration values had keys in common. This is
// because serialization flattens configurable map-valued attributes.
//
// As long as serialization does this flattening, to avoid failure during deserialization,
// we dedupe entries in the list by their keys.
// TODO(bazel-team): Serialize and deserialize configured values with fidelity (without
// flattening them).
ImmutableMap.Builder<String, String> builder = ImmutableMap.builder();
HashSet<String> keysSeenSoFar = Sets.newHashSet();
for (Build.StringDictEntry entry : attrPb.getStringDictValueList()) {
String key = entry.getKey();
if (keysSeenSoFar.add(key)) {
builder.put(key, entry.getValue());
}
}
return builder.build();
}
case STRING_DICT_UNARY:
{
// See STRING_DICT case's comment about why this dedupes entries by their keys.
ImmutableMap.Builder<String, String> builder = ImmutableMap.builder();
HashSet<String> keysSeenSoFar = Sets.newHashSet();
for (StringDictUnaryEntry entry : attrPb.getStringDictUnaryValueList()) {
String key = entry.getKey();
if (keysSeenSoFar.add(key)) {
builder.put(key, entry.getValue());
}
}
return builder.build();
}
case FILESET_ENTRY_LIST:
return deserializeFilesetEntries(attrPb.getFilesetListValueList());
case LABEL_LIST_DICT:
{
// See STRING_DICT case's comment about why this dedupes entries by their keys.
ImmutableMap.Builder<String, List<Label>> builder = ImmutableMap.builder();
HashSet<String> keysSeenSoFar = Sets.newHashSet();
for (Build.LabelListDictEntry entry : attrPb.getLabelListDictValueList()) {
String key = entry.getKey();
if (keysSeenSoFar.add(key)) {
builder.put(key, deserializeLabels(entry.getValueList()));
}
}
return builder.build();
}
case STRING_LIST_DICT:
{
// See STRING_DICT case's comment about why this dedupes entries by their keys.
ImmutableMap.Builder<String, List<String>> builder = ImmutableMap.builder();
HashSet<String> keysSeenSoFar = Sets.newHashSet();
for (Build.StringListDictEntry entry : attrPb.getStringListDictValueList()) {
String key = entry.getKey();
if (keysSeenSoFar.add(key)) {
builder.put(key, ImmutableList.copyOf(entry.getValueList()));
}
}
return builder.build();
}
case BOOLEAN:
return attrPb.hasBooleanValue() ? attrPb.getBooleanValue() : null;
case TRISTATE:
return attrPb.hasStringValue() ? deserializeTriStateValue(attrPb.getStringValue()) : null;
case INTEGER_LIST:
return ImmutableList.copyOf(attrPb.getIntListValueList());
default:
throw new PackageDeserializationException("Invalid discriminator: " + attrPb.getType());
}
}
private static FilesetEntry.SymlinkBehavior pbToSymlinkBehavior(
Build.FilesetEntry.SymlinkBehavior symlinkBehavior) {
switch (symlinkBehavior) {
case COPY:
return FilesetEntry.SymlinkBehavior.COPY;
case DEREFERENCE:
return FilesetEntry.SymlinkBehavior.DEREFERENCE;
default:
throw new IllegalStateException();
}
}
/**
* An special {@code AttributeContainer} implementation that does not keep the location and can
* contain a hashcode of the target attributes.
*/
public static class AttributeContainerWithoutLocation extends AttributeContainer {
@Nullable private final HashCode syntheticAttrHash;
private AttributeContainerWithoutLocation(
RuleClass ruleClass, @Nullable HashCode syntheticAttrHash) {
super(ruleClass, null);
this.syntheticAttrHash = syntheticAttrHash;
}
@Override
public Location getAttributeLocation(String attrName) {
return EmptyLocation.INSTANCE;
}
@Override
void setAttributeLocation(int attrIndex, Location location) {
throw new UnsupportedOperationException("Setting location not supported");
}
@Override
void setAttributeLocation(Attribute attribute, Location location) {
throw new UnsupportedOperationException("Setting location not supported");
}
@Nullable
public HashCode getSyntheticAttrHash() {
return syntheticAttrHash;
}
private void clearIfNotLabel(String attr) {
setAttributeValueByName(attr, null);
}
}
/**
* Creates a rule with the attribute values that are already parsed.
*
* <p><b>WARNING:</b> This assumes that the attribute values here have the right type and bypasses
* some sanity checks. If they are of the wrong type, everything will come down burning.
*/
@SuppressWarnings("unchecked")
private static Rule createRuleWithParsedAttributeValues(
RuleClass ruleClass,
Label label,
Package.Builder pkgBuilder,
Location ruleLocation,
Map<String, ParsedAttributeValue> attributeValues,
EventHandler eventHandler,
AttributeContainer attributeContainer)
throws LabelSyntaxException, InterruptedException {
Rule rule =
pkgBuilder.newRuleWithLabelAndAttrContainer(
label, ruleClass, null, ruleLocation, attributeContainer);
rule.checkValidityPredicate(eventHandler);
for (Attribute attribute : rule.getRuleClassObject().getAttributes()) {
ParsedAttributeValue value = attributeValues.get(attribute.getName());
if (attribute.isMandatory()) {
Preconditions.checkState(value != null);
}
if (value == null) {
continue;
}
rule.setAttributeValue(attribute, value.value, value.explicitlySpecified);
ruleClass.checkAllowedValues(rule, attribute, eventHandler);
if (attribute.getName().equals("visibility")) {
// TODO(bazel-team): Verify that this cast works
rule.setVisibility(PackageFactory.getVisibility((List<Label>) value.value));
}
}
rule.populateOutputFiles(eventHandler, pkgBuilder);
Preconditions.checkState(!rule.containsErrors());
return rule;
}
private static class ParsedAttributeValue {
private final boolean explicitlySpecified;
private final Object value;
private ParsedAttributeValue(boolean explicitlySpecified, Object value) {
this.explicitlySpecified = explicitlySpecified;
this.value = value;
}
}
}
@ManageLifecycle
public class SingleServerInventoryView extends ServerInventoryView<DataSegment>
implements FilteredServerInventoryView {
private static final EmittingLogger log = new EmittingLogger(SingleServerInventoryView.class);
private static final Interner<DataSegment> DATA_SEGMENT_INTERNER = Interners.newWeakInterner();
private final ConcurrentMap<SegmentCallback, Predicate<Pair<DruidServerMetadata, DataSegment>>>
segmentPredicates = new MapMaker().makeMap();
private final Predicate<Pair<DruidServerMetadata, DataSegment>> defaultFilter;
@Inject
public SingleServerInventoryView(
final ZkPathsConfig zkPaths,
final CuratorFramework curator,
final ObjectMapper jsonMapper,
final Predicate<Pair<DruidServerMetadata, DataSegment>> defaultFilter) {
super(
log,
zkPaths.getAnnouncementsPath(),
zkPaths.getServedSegmentsPath(),
curator,
jsonMapper,
new TypeReference<DataSegment>() {});
Preconditions.checkNotNull(defaultFilter);
this.defaultFilter = defaultFilter;
}
@Override
protected DruidServer addInnerInventory(
DruidServer container, String inventoryKey, DataSegment inventory) {
Predicate<Pair<DruidServerMetadata, DataSegment>> predicate =
Predicates.or(defaultFilter, Predicates.or(segmentPredicates.values()));
if (predicate.apply(Pair.of(container.getMetadata(), inventory))) {
addSingleInventory(container, inventory);
}
return container;
}
@Override
protected DruidServer updateInnerInventory(
DruidServer container, String inventoryKey, DataSegment inventory) {
return addInnerInventory(container, inventoryKey, inventory);
}
@Override
protected DruidServer removeInnerInventory(DruidServer container, String inventoryKey) {
removeSingleInventory(container, inventoryKey);
return container;
}
public void registerSegmentCallback(
final Executor exec,
final SegmentCallback callback,
final Predicate<Pair<DruidServerMetadata, DataSegment>> filter) {
SegmentCallback filteringCallback =
new SingleServerInventoryView.FilteringSegmentCallback(callback, filter);
segmentPredicates.put(filteringCallback, filter);
registerSegmentCallback(exec, filteringCallback);
}
@Override
protected void segmentCallbackRemoved(SegmentCallback callback) {
segmentPredicates.remove(callback);
}
static class FilteringSegmentCallback implements SegmentCallback {
private final SegmentCallback callback;
private final Predicate<Pair<DruidServerMetadata, DataSegment>> filter;
FilteringSegmentCallback(
SegmentCallback callback, Predicate<Pair<DruidServerMetadata, DataSegment>> filter) {
this.callback = callback;
this.filter = filter;
}
@Override
public CallbackAction segmentAdded(DruidServerMetadata server, DataSegment segment) {
final CallbackAction action;
if (filter.apply(Pair.of(server, segment))) {
action = callback.segmentAdded(server, segment);
} else {
action = CallbackAction.CONTINUE;
}
return action;
}
@Override
public CallbackAction segmentRemoved(DruidServerMetadata server, DataSegment segment) {
final CallbackAction action;
if (filter.apply(Pair.of(server, segment))) {
action = callback.segmentRemoved(server, segment);
} else {
action = CallbackAction.CONTINUE;
}
return action;
}
@Override
public CallbackAction segmentViewInitialized() {
return callback.segmentViewInitialized();
}
}
@Override
protected DataSegment internInventory(DataSegment sample) {
return DATA_SEGMENT_INTERNER.intern(sample);
}
}
/**
* The class {@code StringUtilities} defines utility methods for strings.
*
* @coverage dart.engine.utilities
*/
public final class StringUtilities {
/** The empty String {@code ""}. */
public static final String EMPTY = "";
/** An empty array of strings. */
public static final String[] EMPTY_ARRAY = new String[0];
/** The {@link Interner} instance to use for {@link #intern(String)}. */
private static final Interner<String> INTERNER = Interners.newWeakInterner();
/** Abbreviates a String using ellipses inserted at left. */
public static String abbreviateLeft(String s, int width) {
int length = s.length();
if (length > width) {
if (width < 4) {
throw new IllegalArgumentException("Minimal width is 4");
}
return "..." + s.substring(length - (width - 3));
}
return s;
}
/**
* Return {@code true} if the three-character substring occurs at the end of the given string.
*
* @param string the string being searched
* @param char1 the first character in the substring
* @param char2 the second character in the substring
* @param char3 the third character in the substring
* @return {@code true} if the substring occurs at the end of the string
*/
public static boolean endsWith3(String string, int char1, int char2, int char3) {
int length = string.length();
return length >= 3
&& string.charAt(length - 3) == char1
&& string.charAt(length - 2) == char2
&& string.charAt(length - 1) == char3;
}
/**
* Return {@code true} if the given string ends with the given character.
*
* @param string the string being searched
* @param character the character being tested for
* @return {@code true} if the string ends with the character
*/
public static boolean endsWithChar(String string, int character) {
int length = string.length();
return length > 0 && string.charAt(length - 1) == character;
}
/**
* Return the index of the first occurrence of the given character in the given string that is at
* or after the given starting index. Return {@code -1} if the substring does not occur.
*
* @param string the string being searched
* @param startIndex the index at which the search should begin
* @param char1 the first character in the substring
* @return the index of the first occurrence of the substring
*/
public static int indexOf1(String string, int startIndex, int char1) {
int index = startIndex;
int last = string.length();
while (index < last) {
if (string.charAt(index) == char1) {
return index;
}
index++;
}
return -1;
}
/**
* Return the index of the first occurrence of the given characters as a substring of the given
* string that is at or after the given starting index. Return {@code -1} if the substring does
* not occur.
*
* @param string the string being searched
* @param startIndex the index at which the search should begin
* @param char1 the first character in the substring
* @param char2 the second character in the substring
* @return the index of the first occurrence of the substring
*/
public static int indexOf2(String string, int startIndex, int char1, int char2) {
int index = startIndex;
int last = string.length() - 1;
while (index < last) {
if (string.charAt(index) == char1 && string.charAt(index + 1) == char2) {
return index;
}
index++;
}
return -1;
}
/**
* Return the index of the first occurrence of the given characters as a substring of the given
* string that is at or after the given starting index. Return {@code -1} if the substring does
* not occur.
*
* @param string the string being searched
* @param startIndex the index at which the search should begin
* @param char1 the first character in the substring
* @param char2 the second character in the substring
* @param char3 the third character in the substring
* @param char4 the fourth character in the substring
* @return the index of the first occurrence of the substring
*/
public static int indexOf4(
String string, int startIndex, int char1, int char2, int char3, int char4) {
int index = startIndex;
int last = string.length() - 3;
while (index < last) {
if (string.charAt(index) == char1
&& string.charAt(index + 1) == char2
&& string.charAt(index + 2) == char3
&& string.charAt(index + 3) == char4) {
return index;
}
index++;
}
return -1;
}
/**
* Return the index of the first occurrence of the given characters as a substring of the given
* string that is at or after the given starting index. Return {@code -1} if the substring does
* not occur.
*
* @param string the string being searched
* @param startIndex the index at which the search should begin
* @param char1 the first character in the substring
* @param char2 the second character in the substring
* @param char3 the third character in the substring
* @param char4 the fourth character in the substring
* @param char5 the fifth character in the substring
* @return the index of the first occurrence of the substring
*/
public static int indexOf5(
String string, int startIndex, int char1, int char2, int char3, int char4, int char5) {
int index = startIndex;
int last = string.length() - 4;
while (index < last) {
if (string.charAt(index) == char1
&& string.charAt(index + 1) == char2
&& string.charAt(index + 2) == char3
&& string.charAt(index + 3) == char4
&& string.charAt(index + 4) == char5) {
return index;
}
index++;
}
return -1;
}
/**
* Return the index of the first not letter/digit character in the given string that is at or
* after the given starting index. Return the length of the given string if the all characters to
* the end are letters/digits.
*
* @param string the string being searched
* @param startIndex the index at which the search should begin
* @return the index of the first not letter/digit character
*/
public static int indexOfFirstNotLetterDigit(String string, int startIndex) {
int index = startIndex;
int last = string.length();
while (index < last) {
char c = string.charAt(index);
if (!Character.isLetterOrDigit(c)) {
return index;
}
index++;
}
return last;
}
/**
* Returns a canonical representation for the given {@link String}.
*
* @return the given {@link String} or its canonical representation.
*/
public static String intern(String str) {
if (str == null) {
return null;
}
str = new String(str);
return INTERNER.intern(str);
}
/**
* Checks if the CharSequence contains only Unicode letters.
*
* <p>{@code null} will return {@code false}. An empty CharSequence (length()=0) will return
* {@code false}.
*
* <pre>
* StringUtils.isAlpha(null) = false
* StringUtils.isAlpha("") = false
* StringUtils.isAlpha(" ") = false
* StringUtils.isAlpha("abc") = true
* StringUtils.isAlpha("ab2c") = false
* StringUtils.isAlpha("ab-c") = false
* </pre>
*
* @param cs the CharSequence to check, may be null
* @return {@code true} if only contains letters, and is non-null
*/
public static boolean isAlpha(CharSequence cs) {
if (cs == null || cs.length() == 0) {
return false;
}
int sz = cs.length();
for (int i = 0; i < sz; i++) {
if (Character.isLetter(cs.charAt(i)) == false) {
return false;
}
}
return true;
}
/**
* Return {@code true} if the given CharSequence is empty ("") or null.
*
* <pre>
* StringUtils.isEmpty(null) = true
* StringUtils.isEmpty("") = true
* StringUtils.isEmpty(" ") = false
* StringUtils.isEmpty("bob") = false
* StringUtils.isEmpty(" bob ") = false
* </pre>
*
* @param cs the CharSequence to check, may be null
* @return {@code true} if the CharSequence is empty or null
*/
public static boolean isEmpty(CharSequence cs) {
return cs == null || cs.length() == 0;
}
/**
* Checks if the String can be used as a tag name.
*
* <p>{@code null} will return {@code false}. An empty String (length()=0) will return {@code
* false}.
*
* <pre>
* StringUtils.isAlpha(null) = false
* StringUtils.isAlpha("") = false
* StringUtils.isAlpha(" ") = false
* StringUtils.isAlpha("ab c") = false
* StringUtils.isAlpha("abc") = true
* StringUtils.isAlpha("ab2c") = true
* StringUtils.isAlpha("ab-c") = true
* </pre>
*
* @param s the String to check, may be null
* @return {@code true} if can be used as a tag name, and is non-null
*/
public static boolean isTagName(String s) {
if (s == null || s.length() == 0) {
return false;
}
int sz = s.length();
for (int i = 0; i < sz; i++) {
char c = s.charAt(i);
if (!Character.isLetter(c)) {
if (i == 0) {
return false;
}
if (!Character.isDigit(c) && c != '-') {
return false;
}
}
}
return true;
}
/**
* Produce a string containing all of the names in the given array, surrounded by single quotes,
* and separated by commas. The list must contain at least two elements.
*
* @param names the names to be printed
* @return the result of printing the names
*/
public static String printListOfQuotedNames(String[] names) {
if (names == null) {
throw new IllegalArgumentException("The list must not be null");
}
int count = names.length;
if (count < 2) {
throw new IllegalArgumentException("The list must contain at least two names");
}
StringBuilder builder = new StringBuilder();
builder.append("'");
builder.append(names[0]);
builder.append("'");
for (int i = 1; i < count - 1; i++) {
builder.append(", '");
builder.append(names[i]);
builder.append("'");
}
builder.append(" and '");
builder.append(names[count - 1]);
builder.append("'");
return builder.toString();
}
/**
* Return {@code true} if the two-character substring occurs at the given index in the given
* string.
*
* @param string the string being searched
* @param startIndex the index at which the search should begin
* @param char1 the first character in the substring
* @param char2 the second character in the substring
* @return {@code true} if the substring occurs at the given index in the string
*/
public static boolean startsWith2(String string, int startIndex, int char1, int char2) {
return string.length() - startIndex >= 2
&& string.charAt(startIndex) == char1
&& string.charAt(startIndex + 1) == char2;
}
/**
* Return {@code true} if the three-character substring occurs at the given index in the given
* string.
*
* @param string the string being searched
* @param startIndex the index at which the search should begin
* @param char1 the first character in the substring
* @param char2 the second character in the substring
* @param char3 the third character in the substring
* @return {@code true} if the substring occurs at the given index in the string
*/
public static boolean startsWith3(
String string, int startIndex, int char1, int char2, int char3) {
return string.length() - startIndex >= 3
&& string.charAt(startIndex) == char1
&& string.charAt(startIndex + 1) == char2
&& string.charAt(startIndex + 2) == char3;
}
/**
* Return {@code true} if the four-character substring occurs at the given index in the given
* string.
*
* @param string the string being searched
* @param startIndex the index at which the search should begin
* @param char1 the first character in the substring
* @param char2 the second character in the substring
* @param char3 the third character in the substring
* @param char4 the fourth character in the substring
* @return {@code true} if the substring occurs at the given index in the string
*/
public static boolean startsWith4(
String string, int startIndex, int char1, int char2, int char3, int char4) {
return string.length() - startIndex >= 4
&& string.charAt(startIndex) == char1
&& string.charAt(startIndex + 1) == char2
&& string.charAt(startIndex + 2) == char3
&& string.charAt(startIndex + 3) == char4;
}
/**
* Return {@code true} if the five-character substring occurs at the given index in the given
* string.
*
* @param string the string being searched
* @param startIndex the index at which the search should begin
* @param char1 the first character in the substring
* @param char2 the second character in the substring
* @param char3 the third character in the substring
* @param char4 the fourth character in the substring
* @param char5 the fifth character in the substring
* @return {@code true} if the substring occurs at the given index in the string
*/
public static boolean startsWith5(
String string, int startIndex, int char1, int char2, int char3, int char4, int char5) {
return string.length() - startIndex >= 5
&& string.charAt(startIndex) == char1
&& string.charAt(startIndex + 1) == char2
&& string.charAt(startIndex + 2) == char3
&& string.charAt(startIndex + 3) == char4
&& string.charAt(startIndex + 4) == char5;
}
/**
* Return {@code true} if the six-character substring occurs at the given index in the given
* string.
*
* @param string the string being searched
* @param startIndex the index at which the search should begin
* @param char1 the first character in the substring
* @param char2 the second character in the substring
* @param char3 the third character in the substring
* @param char4 the fourth character in the substring
* @param char5 the fifth character in the substring
* @param char6 the sixth character in the substring
* @return {@code true} if the substring occurs at the given index in the string
*/
public static boolean startsWith6(
String string,
int startIndex,
int char1,
int char2,
int char3,
int char4,
int char5,
int char6) {
return string.length() - startIndex >= 6
&& string.charAt(startIndex) == char1
&& string.charAt(startIndex + 1) == char2
&& string.charAt(startIndex + 2) == char3
&& string.charAt(startIndex + 3) == char4
&& string.charAt(startIndex + 4) == char5
&& string.charAt(startIndex + 5) == char6;
}
/**
* Return {@code true} if the given string starts with the given character.
*
* @param string the string being searched
* @param character the character being tested for
* @return {@code true} if the string starts with the character
*/
public static boolean startsWithChar(String string, int character) {
return string.length() > 0 && string.charAt(0) == character;
}
/**
* Gets the substring after the first occurrence of a separator. The separator is not returned.
*
* <p>A {@code null} string input will return {@code null}. An empty ("") string input will return
* the empty string. A {@code null} separator will return the empty string if the input string is
* not {@code null}.
*
* <p>If nothing is found, the empty string is returned.
*
* <pre>
* StringUtils.substringAfter(null, *) = null
* StringUtils.substringAfter("", *) = ""
* StringUtils.substringAfter(*, null) = ""
* StringUtils.substringAfter("abc", "a") = "bc"
* StringUtils.substringAfter("abcba", "b") = "cba"
* StringUtils.substringAfter("abc", "c") = ""
* StringUtils.substringAfter("abc", "d") = ""
* StringUtils.substringAfter("abc", "") = "abc"
* </pre>
*
* @param str the String to get a substring from, may be null
* @param separator the String to search for, may be null
* @return the substring after the first occurrence of the separator, {@code null} if null String
* input
*/
public static String substringAfter(String str, String separator) {
if (isEmpty(str)) {
return str;
}
if (separator == null) {
return EMPTY;
}
int pos = str.indexOf(separator);
if (pos == -1) {
return EMPTY;
}
return str.substring(pos + separator.length());
}
/**
* Return the substring before the first occurrence of a separator. The separator is not returned.
*
* <p>A {@code null} string input will return {@code null}. An empty ("") string input will return
* the empty string. A {@code null} separator will return the input string.
*
* <p>If nothing is found, the string input is returned.
*
* <pre>
* StringUtils.substringBefore(null, *) = null
* StringUtils.substringBefore("", *) = ""
* StringUtils.substringBefore("abc", "a") = ""
* StringUtils.substringBefore("abcba", "b") = "a"
* StringUtils.substringBefore("abc", "c") = "ab"
* StringUtils.substringBefore("abc", "d") = "abc"
* StringUtils.substringBefore("abc", "") = ""
* StringUtils.substringBefore("abc", null) = "abc"
* </pre>
*
* @param str the string to get a substring from, may be null
* @param separator the string to search for, may be null
* @return the substring before the first occurrence of the separator
*/
public static String substringBefore(String str, String separator) {
if (isEmpty(str) || separator == null) {
return str;
}
if (separator.length() == 0) {
return EMPTY;
}
int pos = str.indexOf(separator);
if (pos == -1) {
return str;
}
return str.substring(0, pos);
}
/**
* Return the substring before the first occurrence of a separator. The separator is not included
* in the returned value.
*
* <p>A {@code null} string input will return {@code null}. An empty ("") string input will return
* the empty string.
*
* <p>If nothing is found, the string input is returned.
*
* <pre>
* StringUtils.substringBefore(null, *) = null
* StringUtils.substringBefore("", *) = ""
* StringUtils.substringBefore("abc", 'a') = ""
* StringUtils.substringBefore("abcba", 'b') = "a"
* StringUtils.substringBefore("abc", 'c') = "ab"
* StringUtils.substringBefore("abc", 'd') = "abc"
* </pre>
*
* @param str the string to get a substring from, may be null
* @param separator the character to search for
* @return the substring before the first occurrence of the separator
*/
public static String substringBeforeChar(String str, int separator) {
if (isEmpty(str)) {
return str;
}
int pos = str.indexOf(separator);
if (pos < 0) {
return str;
}
return str.substring(0, pos);
}
/** Prevent the creation of instances of this class. */
private StringUtilities() {}
}
