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/**
* ============LICENSE_START=======================================================
* org.onap.logging
* ================================================================================
* Copyright © 2018 Amdocs
* All rights reserved.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.onap.logging.ref.slf4j.analysis;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.lang3.StringUtils;
/**
* Crude analyzer for log messages, to build a simple
* representation of the call graph.
*/
public class CallGraphAnalyzer {
/** Messages of interest. */
private List<LogEntry> mEntries = new ArrayList<>();
/**
* Capture entry if it's interesting.
* @param entry candidate.
* @return this.
*/
public CallGraphAnalyzer add(final LogEntry entry) {
if (entry.getLogger().contains("ONAPLogAdapterTest")) {
return this;
}
if (StringUtils.isNotBlank(entry.getMarkers())) {
this.mEntries.add(entry);
}
return this;
}
/**
* Get all captured entries, for diagnostics only.
* @return entries.
*/
public List<LogEntry> getEntries() {
return this.mEntries;
}
/**
* Find the entry point into the call graph through the various components.
* @return entry point or (failure) null.
*/
public LogEntry findEntryPoint() {
for (final LogEntry e : this.mEntries) {
if (e.getLogger().endsWith("ComponentAlpha")) {
if ("ENTRY".equals(e.getMarkers())) {
if (StringUtils.isBlank(e.getPartnerName())) {
return e;
}
}
}
}
return null;
}
/**
* Find entries for where a component invokes others.
* @param parent parent ENTRY (not actually the entry where it's doing the invoking).
* @return components invoked by this one.
*/
public List<LogEntry> findInvokes(final LogEntry parent) {
final List<LogEntry> invokes = new ArrayList<>();
for (final LogEntry e : this.mEntries) {
if (StringUtils.equals(parent.getInvocationID(), e.getInvocationID())) {
final String invokingID = e.getInvokingID();
if (StringUtils.isNotBlank(invokingID)) {
invokes.add(e);
}
}
}
return invokes;
}
/**
* Find a specific invocation.
* @param invoke invocation record.
* @return invocation ENTRY, or (failure) null if not found.
*/
public LogEntry findInvocation(final LogEntry invoke) {
for (final LogEntry e : this.mEntries) {
if ("ENTRY".equals(e.getMarkers())) {
if (StringUtils.equals(invoke.getInvokingID(), e.getInvocationID())) {
return e;
}
}
}
return null;
}
}
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