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davsclaus pushed a commit to branch tc-loader
in repository https://gitbox.apache.org/repos/asf/camel.git
The following commit(s) were added to refs/heads/tc-loader by this push:
new 1197136 CAMEL-13313: Add support for generating type converter loader
source code to be able to load component type converters in a faster way
1197136 is described below
commit 11971366e43bae5d9f05481d125859e122aa1936
Author: Claus Ibsen <[email protected]>
AuthorDate: Sat Mar 16 10:53:35 2019 +0100
CAMEL-13313: Add support for generating type converter loader source code
to be able to load component type converters in a faster way
---
.../main/java/org/apache/camel/CamelContext.java | 7 +
.../impl/converter/BaseTypeConverterRegistry.java | 14 +-
.../converter/TypeConverterLoaderRegistry.java | 149 +++++++++++++++++++++
.../apache/camel/impl/AbstractCamelContext.java | 4 +
...BindingWithTypeConverterLoaderRegistryTest.java | 31 +++++
.../tools/apt/AbstractTypeConverterGenerator.java | 8 +-
.../tools/apt/CoreTypeConverterProcessor.java | 2 +-
.../tools/apt/TypeConverterLoaderGenerator.java | 2 +-
8 files changed, 207 insertions(+), 10 deletions(-)
diff --git a/core/camel-api/src/main/java/org/apache/camel/CamelContext.java
b/core/camel-api/src/main/java/org/apache/camel/CamelContext.java
index 7f617c3..e53eea9 100644
--- a/core/camel-api/src/main/java/org/apache/camel/CamelContext.java
+++ b/core/camel-api/src/main/java/org/apache/camel/CamelContext.java
@@ -691,6 +691,13 @@ public interface CamelContext extends SuspendableService,
RuntimeConfiguration {
TypeConverterRegistry getTypeConverterRegistry();
/**
+ * Configures the type converter registry to use, where type converters
can be added or looked up.
+ *
+ * @param typeConverterRegistry the registry to use
+ */
+ void setTypeConverterRegistry(TypeConverterRegistry typeConverterRegistry);
+
+ /**
* Returns the registry used to lookup components by name and type such as
SimpleRegistry, Spring ApplicationContext,
* JNDI, or the OSGi Service Registry.
*
diff --git
a/core/camel-base/src/main/java/org/apache/camel/impl/converter/BaseTypeConverterRegistry.java
b/core/camel-base/src/main/java/org/apache/camel/impl/converter/BaseTypeConverterRegistry.java
index 6380da8..fb23326 100644
---
a/core/camel-base/src/main/java/org/apache/camel/impl/converter/BaseTypeConverterRegistry.java
+++
b/core/camel-base/src/main/java/org/apache/camel/impl/converter/BaseTypeConverterRegistry.java
@@ -77,7 +77,6 @@ public abstract class BaseTypeConverterRegistry extends
ServiceSupport implement
protected final LongAdder noopCounter = new LongAdder();
protected final LongAdder attemptCounter = new LongAdder();
protected final LongAdder missCounter = new LongAdder();
- protected final LongAdder baseHitCounter = new LongAdder();
protected final LongAdder hitCounter = new LongAdder();
protected final LongAdder failedCounter = new LongAdder();
@@ -85,7 +84,10 @@ public abstract class BaseTypeConverterRegistry extends
ServiceSupport implement
this.resolver = resolver;
this.injector = injector;
this.factoryFinder = factoryFinder;
- this.typeConverterLoaders.add(new
AnnotationTypeConverterLoader(resolver));
+ if (resolver != null) {
+ // we only have annotation based package scanning if we have a
resolver
+ this.typeConverterLoaders.add(new
AnnotationTypeConverterLoader(resolver));
+ }
List<FallbackTypeConverter> fallbacks = new ArrayList<>();
// add to string first as it will then be last in the last as to
string can nearly
@@ -547,9 +549,11 @@ public abstract class BaseTypeConverterRegistry extends
ServiceSupport implement
}
protected void loadFallbackTypeConverters() throws IOException,
ClassNotFoundException {
- List<TypeConverter> converters =
factoryFinder.newInstances("FallbackTypeConverter", getInjector(),
TypeConverter.class);
- for (TypeConverter converter : converters) {
- addFallbackTypeConverter(converter, false);
+ if (factoryFinder != null) {
+ List<TypeConverter> converters =
factoryFinder.newInstances("FallbackTypeConverter", getInjector(),
TypeConverter.class);
+ for (TypeConverter converter : converters) {
+ addFallbackTypeConverter(converter, false);
+ }
}
}
diff --git
a/core/camel-base/src/main/java/org/apache/camel/impl/converter/TypeConverterLoaderRegistry.java
b/core/camel-base/src/main/java/org/apache/camel/impl/converter/TypeConverterLoaderRegistry.java
new file mode 100644
index 0000000..d3e716b
--- /dev/null
+++
b/core/camel-base/src/main/java/org/apache/camel/impl/converter/TypeConverterLoaderRegistry.java
@@ -0,0 +1,149 @@
+/**
+ * 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.camel.impl.converter;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.nio.charset.Charset;
+import java.util.Enumeration;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.StringTokenizer;
+
+import org.apache.camel.RuntimeCamelException;
+import org.apache.camel.spi.TypeConverterLoader;
+import org.apache.camel.util.IOHelper;
+import org.apache.camel.util.StringHelper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+// TODO: We can automatic detect this for example like headersmap-factory by
having this on the classpath
+
+/**
+ * An optimized {@link org.apache.camel.spi.TypeConverterRegistry} which loads
+ * the type converters up-front on startup in a faster way by leveraging
+ * source generated type converter loaders (<tt>@Converter(loader = true)</tt>,
+ * and will not perform slower package scanning.
+ */
+public class TypeConverterLoaderRegistry extends BaseTypeConverterRegistry {
+
+ public static final String META_INF_SERVICES =
"META-INF/services/org/apache/camel/TypeConverterLoader";
+
+ private static final Logger LOG =
LoggerFactory.getLogger(TypeConverterLoaderRegistry.class);
+ private static final Charset UTF8 = Charset.forName("UTF-8");
+
+ public TypeConverterLoaderRegistry() {
+ super(null, null, null); // pass in null to base class as we load all
type converters without package scanning
+ }
+
+ @Override
+ public boolean allowNull() {
+ return false;
+ }
+
+ @Override
+ public boolean isRunAllowed() {
+ // as type converter is used during initialization then allow it to
always run
+ return true;
+ }
+
+ @Override
+ protected void doInit() {
+ try {
+ // core type converters is always loaded which does not use any
classpath scanning and therefore is fast
+ loadCoreTypeConverters();
+ int core = typeMappings.size();
+ // load type converters up front
+ loadTypeConverters();
+ int additional = typeMappings.size() - core;
+
+ // report how many type converters we have loaded
+ log.info("Type converters loaded (core: {}, classpath: {})", core,
additional);
+ } catch (Exception e) {
+ throw RuntimeCamelException.wrapRuntimeCamelException(e);
+ }
+ }
+
+ @Override
+ public void loadTypeConverters() throws Exception {
+ String[] lines = findTypeConverterLoaderClasses();
+ for (String line : lines) {
+ String name = StringHelper.after(line, "class=");
+ if (name != null) {
+ LOG.debug("Resolving TypeConverterLoader: {}", name);
+ Class clazz =
getCamelContext().getClassResolver().resolveMandatoryClass(name);
+ Object obj =
getCamelContext().getInjector().newInstance(clazz);
+ if (obj instanceof TypeConverterLoader) {
+ TypeConverterLoader loader = (TypeConverterLoader) obj;
+ LOG.debug("TypeConverterLoader: {} loading converters",
name);
+ loader.load(this);
+ }
+ }
+ }
+ }
+
+ /**
+ * Finds the type converter loader classes from the classpath looking
+ * for text files on the classpath at the {@link #META_INF_SERVICES}
location.
+ */
+ protected String[] findTypeConverterLoaderClasses() throws IOException {
+ Set<String> classes = new HashSet<>();
+ findLoaders(classes, getClass().getClassLoader());
+ return classes.toArray(new String[classes.size()]);
+ }
+
+ protected void findLoaders(Set<String> packages, ClassLoader classLoader)
throws IOException {
+ Enumeration<URL> resources =
classLoader.getResources(META_INF_SERVICES);
+ while (resources.hasMoreElements()) {
+ URL url = resources.nextElement();
+ LOG.debug("Loading file {} to retrieve list of type converters,
from url: {}", META_INF_SERVICES, url);
+ BufferedReader reader = IOHelper.buffered(new
InputStreamReader(url.openStream(), UTF8));
+ try {
+ while (true) {
+ String line = reader.readLine();
+ if (line == null) {
+ break;
+ }
+ line = line.trim();
+ if (line.startsWith("#") || line.length() == 0) {
+ continue;
+ }
+ tokenize(packages, line);
+ }
+ } finally {
+ IOHelper.close(reader, null, LOG);
+ }
+ }
+ }
+
+ /**
+ * Tokenizes the line from the META-IN/services file using commas and
+ * ignoring whitespace between packages
+ */
+ private void tokenize(Set<String> packages, String line) {
+ StringTokenizer iter = new StringTokenizer(line, ",");
+ while (iter.hasMoreTokens()) {
+ String name = iter.nextToken().trim();
+ if (name.length() > 0) {
+ packages.add(name);
+ }
+ }
+ }
+
+}
diff --git
a/core/camel-core/src/main/java/org/apache/camel/impl/AbstractCamelContext.java
b/core/camel-core/src/main/java/org/apache/camel/impl/AbstractCamelContext.java
index 503a924..e056f5c 100644
---
a/core/camel-core/src/main/java/org/apache/camel/impl/AbstractCamelContext.java
+++
b/core/camel-core/src/main/java/org/apache/camel/impl/AbstractCamelContext.java
@@ -2446,6 +2446,10 @@ public abstract class AbstractCamelContext extends
ServiceSupport implements Mod
public void setTypeConverterRegistry(TypeConverterRegistry
typeConverterRegistry) {
this.typeConverterRegistry = doAddService(typeConverterRegistry);
+ // some registries are also a type converter implementation
+ if (typeConverterRegistry instanceof TypeConverter) {
+ this.typeConverter = (TypeConverter) typeConverterRegistry;
+ }
}
public Injector getInjector() {
diff --git
a/core/camel-core/src/test/java/org/apache/camel/component/bean/BeanProxyNoBindingWithTypeConverterLoaderRegistryTest.java
b/core/camel-core/src/test/java/org/apache/camel/component/bean/BeanProxyNoBindingWithTypeConverterLoaderRegistryTest.java
new file mode 100644
index 0000000..46cffa6
--- /dev/null
+++
b/core/camel-core/src/test/java/org/apache/camel/component/bean/BeanProxyNoBindingWithTypeConverterLoaderRegistryTest.java
@@ -0,0 +1,31 @@
+/**
+ * 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.camel.component.bean;
+
+import org.apache.camel.CamelContext;
+import org.apache.camel.impl.converter.TypeConverterLoaderRegistry;
+
+public class BeanProxyNoBindingWithTypeConverterLoaderRegistryTest extends
BeanProxyNoBindingTest {
+
+ @Override
+ protected CamelContext createCamelContext() throws Exception {
+ CamelContext context = super.createCamelContext();
+ // switch to using the faster type converter loader
+ context.setTypeConverterRegistry(new TypeConverterLoaderRegistry());
+ return context;
+ }
+}
diff --git
a/tooling/apt/src/main/java/org/apache/camel/tools/apt/AbstractTypeConverterGenerator.java
b/tooling/apt/src/main/java/org/apache/camel/tools/apt/AbstractTypeConverterGenerator.java
index b54d14a..b2c509c 100644
---
a/tooling/apt/src/main/java/org/apache/camel/tools/apt/AbstractTypeConverterGenerator.java
+++
b/tooling/apt/src/main/java/org/apache/camel/tools/apt/AbstractTypeConverterGenerator.java
@@ -201,7 +201,7 @@ public abstract class AbstractTypeConverterGenerator
extends AbstractCamelAnnota
return false;
}
- void writeConverters(String fqn, String suffix, ClassConverters
converters) throws Exception {
+ void writeConverters(String fqn, String suffix, boolean staticInstance,
ClassConverters converters) throws Exception {
int pos = fqn.lastIndexOf('.');
String p = fqn.substring(0, pos);
@@ -224,7 +224,9 @@ public abstract class AbstractTypeConverterGenerator
extends AbstractCamelAnnota
writer.append("@SuppressWarnings(\"unchecked\")\n");
writer.append("public class ").append(c).append(" implements
TypeConverterLoader {\n");
writer.append("\n");
- writer.append(" public static final ").append(c).append("
INSTANCE = new ").append(c).append("();\n");
+ if (staticInstance) {
+ writer.append(" public static final ").append(c).append("
INSTANCE = new ").append(c).append("();\n");
+ }
writer.append("\n");
if (converters.size() > 0) {
@@ -256,7 +258,7 @@ public abstract class AbstractTypeConverterGenerator
extends AbstractCamelAnnota
writer.append(" private final DoubleMap<Class<?>, Class<?>,
BaseTypeConverter> converters = new
DoubleMap<>(").append(String.valueOf(converters.size())).append(");\n");
writer.append("\n");
}
- writer.append(" private ").append(c).append("() {\n");
+ writer.append(" ").append(staticInstance ? "private " : "public
").append(c).append("() {\n");
for (Map.Entry<String, Map<TypeMirror, ExecutableElement>> to :
converters.getConverters().entrySet()) {
for (Map.Entry<TypeMirror, ExecutableElement> from :
to.getValue().entrySet()) {
diff --git
a/tooling/apt/src/main/java/org/apache/camel/tools/apt/CoreTypeConverterProcessor.java
b/tooling/apt/src/main/java/org/apache/camel/tools/apt/CoreTypeConverterProcessor.java
index efd7d54..e42b5d6 100644
---
a/tooling/apt/src/main/java/org/apache/camel/tools/apt/CoreTypeConverterProcessor.java
+++
b/tooling/apt/src/main/java/org/apache/camel/tools/apt/CoreTypeConverterProcessor.java
@@ -60,7 +60,7 @@ public class CoreTypeConverterProcessor extends
AbstractTypeConverterGenerator {
for (Map.Entry<String, ClassConverters> entry : converters.entrySet())
{
String key = entry.getKey();
ClassConverters value = entry.getValue();
- writeConverters(key, null, value);
+ writeConverters(key, null, true, value);
}
}
diff --git
a/tooling/apt/src/main/java/org/apache/camel/tools/apt/TypeConverterLoaderGenerator.java
b/tooling/apt/src/main/java/org/apache/camel/tools/apt/TypeConverterLoaderGenerator.java
index ecf2aa7..75f4765 100644
---
a/tooling/apt/src/main/java/org/apache/camel/tools/apt/TypeConverterLoaderGenerator.java
+++
b/tooling/apt/src/main/java/org/apache/camel/tools/apt/TypeConverterLoaderGenerator.java
@@ -46,7 +46,7 @@ public class TypeConverterLoaderGenerator extends
AbstractTypeConverterGenerator
for (Map.Entry<String, ClassConverters> entry : converters.entrySet())
{
String key = entry.getKey();
ClassConverters value = entry.getValue();
- writeConverters(key, "Loader", value);
+ writeConverters(key, "Loader", false, value);
}
writeConverterLoaderMetaInfo(converters);
}
