Change log4j to slf4j #55

webmagic-core/src/main/java/us/codecraft/webmagic/downloader/HttpClientDownloader.java

@@ -10,7 +10,8 @@ import org.apache.http.client.methods.CloseableHttpResponse;
 import org.apache.http.client.methods.RequestBuilder;
 import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.util.EntityUtils;
-import org.apache.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import us.codecraft.webmagic.Page;
 import us.codecraft.webmagic.Request;
 import us.codecraft.webmagic.Site;
@@ -34,7 +35,7 @@ import java.util.Set;
 @ThreadSafe
 public class HttpClientDownloader implements Downloader {
 
-    private Logger logger = Logger.getLogger(getClass());
+    private Logger logger = LoggerFactory.getLogger(getClass());
 
     private final Map<String, CloseableHttpClient> httpClients = new HashMap<String, CloseableHttpClient>();
 

webmagic-core/src/main/java/us/codecraft/webmagic/pipeline/FilePipeline.java

@@ -2,7 +2,8 @@ package us.codecraft.webmagic.pipeline;
 
 import org.apache.commons.codec.digest.DigestUtils;
 import org.apache.http.annotation.ThreadSafe;
-import org.apache.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import us.codecraft.webmagic.ResultItems;
 import us.codecraft.webmagic.Task;
 import us.codecraft.webmagic.utils.FilePersistentBase;
@@ -21,7 +22,7 @@ import java.util.Map;
 @ThreadSafe
 public class FilePipeline extends FilePersistentBase implements Pipeline {
 
-    private Logger logger = Logger.getLogger(getClass());
+    private Logger logger = LoggerFactory.getLogger(getClass());
 
     /**
      * create a FilePipeline with default path"/data/webmagic/"

webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/PriorityScheduler.java

@@ -1,7 +1,8 @@
 package us.codecraft.webmagic.scheduler;
 
 import org.apache.http.annotation.ThreadSafe;
-import org.apache.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import us.codecraft.webmagic.Request;
 import us.codecraft.webmagic.Task;
 import us.codecraft.webmagic.utils.NumberUtils;
@@ -24,7 +25,7 @@ public class PriorityScheduler implements Scheduler {
 
     public static final int INITIAL_CAPACITY = 5;
 
-    private Logger logger = Logger.getLogger(getClass());
+    private Logger logger = LoggerFactory.getLogger(getClass());
 
     private BlockingQueue<Request> noPriorityQueue = new LinkedBlockingQueue<Request>();
 
@@ -46,9 +47,7 @@ public class PriorityScheduler implements Scheduler {
 
     @Override
     public synchronized void push(Request request, Task task) {
-        if (logger.isDebugEnabled()) {
         logger.debug("push to queue " + request.getUrl());
-        }
         if (urls.add(request.getUrl())) {
             if (request.getPriority() == 0) {
                 noPriorityQueue.add(request);

webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/QueueScheduler.java

@@ -1,7 +1,8 @@
 package us.codecraft.webmagic.scheduler;
 
 import org.apache.http.annotation.ThreadSafe;
-import org.apache.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import us.codecraft.webmagic.Request;
 import us.codecraft.webmagic.Task;
 
@@ -10,6 +11,7 @@ import java.util.Set;
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.LinkedBlockingQueue;
 
+
 /**
  * Basic Scheduler implementation.<br>
  * Store urls to fetch in LinkedBlockingQueue and remove duplicate urls by HashMap.
@@ -20,7 +22,7 @@ import java.util.concurrent.LinkedBlockingQueue;
 @ThreadSafe
 public class QueueScheduler implements Scheduler {
 
-    private Logger logger = Logger.getLogger(getClass());
+    private Logger logger = LoggerFactory.getLogger(getClass());
 
     private BlockingQueue<Request> queue = new LinkedBlockingQueue<Request>();
 

webmagic-core/src/main/java/us/codecraft/webmagic/selector/Html.java

@@ -1,8 +1,9 @@
 package us.codecraft.webmagic.selector;
 
-import org.apache.log4j.Logger;
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import us.codecraft.webmagic.utils.EnvironmentUtil;
 
 import java.util.ArrayList;
@@ -16,7 +17,7 @@ import java.util.List;
  */
 public class Html extends PlainText {
 
-    private Logger logger = Logger.getLogger(getClass());
+    private Logger logger = LoggerFactory.getLogger(getClass());
 
     /**
      * Store parsed document for better performance when only one text exist.

webmagic-extension/src/main/java/us/codecraft/webmagic/configurable/PropertyLoader.java

@@ -5,11 +5,14 @@ import us.codecraft.webmagic.processor.PageProcessor;
 import java.util.Map;
 
 /**
+ * Inject property to object by {@link Inject} annotation.
+ *
  * @author yihua.huang@dianping.com
  */
-public interface PropertyLoader<T> {
+public class PropertyLoader<T> {
+
+    public T load(T object, Map<String, String> properties) {
+        return object;
+    }
 
-    PropertyLoader<T> clazz(Class<?> clazz);
-
-    T load(Map<String, String> properties);
 }

webmagic-extension/src/main/java/us/codecraft/webmagic/downloader/FileCache.java

@@ -2,7 +2,8 @@ package us.codecraft.webmagic.downloader;
 
 import org.apache.commons.codec.digest.DigestUtils;
 import org.apache.commons.lang3.StringUtils;
-import org.apache.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import us.codecraft.webmagic.*;
 import us.codecraft.webmagic.utils.Experimental;
 import us.codecraft.webmagic.pipeline.Pipeline;
@@ -28,7 +29,7 @@ public class FileCache extends FilePersistentBase implements Downloader, Pipelin
 
     private final PageProcessor pageProcessor;
 
-    private Logger logger = Logger.getLogger(getClass());
+    private Logger logger = LoggerFactory.getLogger(getClass());
 
     public FileCache(String startUrl, String urlPattern) {
         this(startUrl, urlPattern, "/data/webmagic/temp/");

webmagic-extension/src/main/java/us/codecraft/webmagic/example/GithubRepoApi.java

@@ -27,7 +27,7 @@ public class GithubRepoApi implements HasKey {
     @ExtractBy(type = ExtractBy.Type.JsonPath, value = "$.stargazers_count")
     private int star;
 
-    @ExtractBy(type = ExtractBy.Type.JsonPath, value = "$.forks_count")
+    @ExtractBy(type = ExtractBy.Type.JsonPath, value = "$.homepage")
     private int fork;
 
     @ExtractByUrl

webmagic-extension/src/main/java/us/codecraft/webmagic/model/PageModelExtractor.java

@@ -1,7 +1,8 @@
 package us.codecraft.webmagic.model;
 
 import org.apache.commons.lang3.StringUtils;
-import org.apache.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import us.codecraft.webmagic.Page;
 import us.codecraft.webmagic.model.annotation.*;
 import us.codecraft.webmagic.model.formatter.BasicTypeFormatter;
@@ -40,7 +41,7 @@ class PageModelExtractor {
 
     private Extractor objectExtractor;
 
-    private Logger logger = Logger.getLogger(getClass());
+    private Logger logger = LoggerFactory.getLogger(getClass());
 
     public static PageModelExtractor create(Class clazz) {
         PageModelExtractor pageModelExtractor = new PageModelExtractor();

webmagic-extension/src/main/java/us/codecraft/webmagic/pipeline/FilePageModelPipeline.java

@@ -2,7 +2,8 @@ package us.codecraft.webmagic.pipeline;
 
 import org.apache.commons.codec.digest.DigestUtils;
 import org.apache.commons.lang3.builder.ToStringBuilder;
-import org.apache.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import us.codecraft.webmagic.Task;
 import us.codecraft.webmagic.model.HasKey;
 import us.codecraft.webmagic.utils.FilePersistentBase;
@@ -21,7 +22,7 @@ import java.io.PrintWriter;
  */
 public class FilePageModelPipeline extends FilePersistentBase implements PageModelPipeline {
 
-    private Logger logger = Logger.getLogger(getClass());
+    private Logger logger = LoggerFactory.getLogger(getClass());
 
     /**
      * new JsonFilePageModelPipeline with default path "/data/webmagic/"

webmagic-extension/src/main/java/us/codecraft/webmagic/pipeline/JsonFilePageModelPipeline.java

@@ -3,7 +3,8 @@ package us.codecraft.webmagic.pipeline;
 import com.alibaba.fastjson.JSON;
 import org.apache.commons.codec.digest.DigestUtils;
 import org.apache.commons.lang3.builder.ToStringBuilder;
-import org.apache.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import us.codecraft.webmagic.Task;
 import us.codecraft.webmagic.model.HasKey;
 import us.codecraft.webmagic.utils.FilePersistentBase;
@@ -22,7 +23,7 @@ import java.io.PrintWriter;
  */
 public class JsonFilePageModelPipeline extends FilePersistentBase implements PageModelPipeline {
 
-    private Logger logger = Logger.getLogger(getClass());
+    private Logger logger = LoggerFactory.getLogger(getClass());
 
     /**
      * new JsonFilePageModelPipeline with default path "/data/webmagic/"

webmagic-extension/src/main/java/us/codecraft/webmagic/pipeline/JsonFilePipeline.java

@@ -2,7 +2,8 @@ package us.codecraft.webmagic.pipeline;
 
 import com.alibaba.fastjson.JSON;
 import org.apache.commons.codec.digest.DigestUtils;
-import org.apache.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import us.codecraft.webmagic.ResultItems;
 import us.codecraft.webmagic.Task;
 import us.codecraft.webmagic.utils.FilePersistentBase;
@@ -20,7 +21,7 @@ import java.io.PrintWriter;
  */
 public class JsonFilePipeline extends FilePersistentBase implements Pipeline {
 
-    private Logger logger = Logger.getLogger(getClass());
+    private Logger logger = LoggerFactory.getLogger(getClass());
 
     /**
      * new JsonFilePageModelPipeline with default path "/data/webmagic/"

webmagic-extension/src/main/java/us/codecraft/webmagic/scheduler/FileCacheQueueScheduler.java

@@ -2,7 +2,8 @@ package us.codecraft.webmagic.scheduler;
 
 import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang3.math.NumberUtils;
-import org.apache.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import us.codecraft.webmagic.Request;
 import us.codecraft.webmagic.Task;
 
@@ -24,7 +25,7 @@ import java.util.concurrent.atomic.AtomicInteger;
  */
 public class FileCacheQueueScheduler implements Scheduler {
 
-    private Logger logger = Logger.getLogger(getClass());
+    private Logger logger = LoggerFactory.getLogger(getClass());
 
     private String filePath = System.getProperty("java.io.tmpdir");