package com.googlecode.jmxtrans.jmx;
import com.google.common.base.Optional;
import com.google.common.base.Predicate;
import com.google.common.collect.ImmutableList;
import org.junit.Before;
import org.junit.Test;
import javax.annotation.Nullable;
import javax.management.Attribute;
import javax.management.AttributeList;
import javax.management.AttributeNotFoundException;
import javax.management.InstanceNotFoundException;
import javax.management.MBeanException;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectInstance;
import javax.management.ObjectName;
import javax.management.ReflectionException;
import java.lang.management.ManagementFactory;
import java.util.List;
import java.util.Map;
import com.googlecode.jmxtrans.model.Query;
import com.googlecode.jmxtrans.model.Result;
import static com.google.common.collect.FluentIterable.from;
import static java.lang.Boolean.TRUE;
import static org.assertj.core.api.Assertions.assertThat;
/**
* <b>Warning:</b> This test class relies on MBeans exposed by the JVM. As far
* as I understand the documentation, it only relies on beans and attributes
* that should be present on all implementations. Still there is some chance
* that this test will fail on some JVMs or that it depends too much on
* specific platform properties.
*/
public class JmxResultProcessorTest {
private Query query;
@Before
public void initConfiguration() {
query = Query.builder()
.setResultAlias("resultAlias")
.build();
}
@Test
public void canCreateBasicResultData() throws MalformedObjectNameException, InstanceNotFoundException {
Attribute integerAttribute = new Attribute("StartTime", 51L);
ObjectInstance runtime = getRuntime();
List<Result> results = new JmxResultProcessor(
query,
runtime,
ImmutableList.of(integerAttribute),
runtime.getClassName()).getResults();
assertThat(results).hasSize(1);
Result integerResult = results.get(0);
assertThat(integerResult.getAttributeName()).isEqualTo("StartTime");
assertThat(integerResult.getClassName()).isEqualTo("sun.management.RuntimeImpl");
assertThat(integerResult.getClassNameAlias()).isEqualTo("resultAlias");
assertThat(integerResult.getTypeName()).isEqualTo("type=Runtime");
assertThat(integerResult.getValues()).hasSize(1);
}
@Test
public void canReadSingleIntegerValue() throws MalformedObjectNameException, InstanceNotFoundException {
Attribute integerAttribute = new Attribute("CollectionCount", 51L);
ObjectInstance runtime = getRuntime();
List<Result> results = new JmxResultProcessor(
query,
runtime,
ImmutableList.of(integerAttribute),
runtime.getClassName()).getResults();
assertThat(results).hasSize(1);
Result integerResult = results.get(0);
assertThat(integerResult.getAttributeName()).isEqualTo("CollectionCount");
assertThat(integerResult.getValues()).hasSize(1);
Object objectValue = integerResult.getValues().get("CollectionCount");
assertThat(objectValue).isInstanceOf(Long.class);
Long integerValue = (Long) objectValue;
assertThat(integerValue).isEqualTo(51L);
}
@Test
public void canReadSingleBooleanValue() throws MalformedObjectNameException, InstanceNotFoundException {
Attribute booleanAttribute = new Attribute("BootClassPathSupported", true);
ObjectInstance runtime = getRuntime();
List<Result> results = new JmxResultProcessor(
query,
runtime,
ImmutableList.of(booleanAttribute),
runtime.getClassName()).getResults();
assertThat(results).hasSize(1);
Result result = results.get(0);
assertThat(result.getAttributeName()).isEqualTo("BootClassPathSupported");
assertThat(result.getValues()).hasSize(1);
Object objectValue = result.getValues().get("BootClassPathSupported");
assertThat(objectValue).isInstanceOf(Boolean.class);
Boolean booleanValue = (Boolean) objectValue;
assertThat(booleanValue).isEqualTo(TRUE);
}
@Test
public void canReadTabularData() throws MalformedObjectNameException, AttributeNotFoundException, MBeanException,
ReflectionException, InstanceNotFoundException {
ObjectInstance runtime = getRuntime();
AttributeList attr = ManagementFactory.getPlatformMBeanServer().getAttributes(
runtime.getObjectName(), new String[]{"SystemProperties"});
List<Result> results = new JmxResultProcessor(
query,
runtime,
attr.asList(),
runtime.getClassName()).getResults();
assertThat(results.size()).isGreaterThan(2);
Optional<Result> result = from(results).firstMatch(new ByAttributeName("SystemProperties.java.version"));
assertThat(result.isPresent()).isTrue();
assertThat(result.get().getAttributeName()).isEqualTo("SystemProperties.java.version");
Map<String,Object> values = result.get().getValues();
assertThat(values).hasSize(2);
Object objectValue = result.get().getValues().get("key");
assertThat(objectValue).isInstanceOf(String.class);
String key = (String) objectValue;
assertThat(key).isEqualTo("java.version");
}
@Test
public void canReadCompositeData() throws MalformedObjectNameException, AttributeNotFoundException, MBeanException,
ReflectionException, InstanceNotFoundException {
ObjectInstance memory = getMemory();
AttributeList attr = ManagementFactory.getPlatformMBeanServer().getAttributes(
memory.getObjectName(), new String[]{"HeapMemoryUsage"});
List<Result> results = new JmxResultProcessor(
query,
memory,
attr.asList(),
memory.getClassName()).getResults();
assertThat(results).hasSize(1);
Result result = results.get(0);
assertThat(result.getAttributeName()).isEqualTo("HeapMemoryUsage");
assertThat(result.getTypeName()).isEqualTo("type=Memory");
Map<String,Object> values = result.getValues();
assertThat(values).hasSize(4);
Object objectValue = result.getValues().get("init");
assertThat(objectValue).isInstanceOf(Long.class);
}
public ObjectInstance getRuntime() throws MalformedObjectNameException, InstanceNotFoundException {
return ManagementFactory.getPlatformMBeanServer().getObjectInstance(
new ObjectName("java.lang", "type", "Runtime"));
}
public ObjectInstance getMemory() throws MalformedObjectNameException, InstanceNotFoundException {
return ManagementFactory.getPlatformMBeanServer().getObjectInstance(
new ObjectName("java.lang", "type", "Memory"));
}
private static class ByAttributeName implements Predicate<Result> {
private final String attributeName;
public ByAttributeName(String attributeName) {
this.attributeName = attributeName;
}
@Override
public boolean apply(@Nullable Result result) {
if (result == null) {
return false;
}
return attributeName.equals(result.getAttributeName());
}
}
}