Filters added

Author: saurabh-vaish

Microservices/SpringCloudZuul/SpringCloud_ZuulGateway-ZuulServer/src/main/java/com/app/filters/ExceptionFilter.java

@@ -0,0 +1,58 @@
+package com.app.filters;
+
+import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants;
+import org.springframework.stereotype.Component;
+
+import com.netflix.zuul.ZuulFilter;
+import com.netflix.zuul.exception.ZuulException;
+
+/**
+ *  Filters are used in zuul server to pre process and post process request and response . 
+ *  There are 4 types of filters .
+ *  
+ *  	MyFilter ----> ZuulFilter (AC) ---> IZuulFilter (I)
+ *  
+ *  
+ *  PreFilter , PostFilter , RouteFilter , ExceptionFilter 
+ * 
+ * 	PreFilter --> Works on request 
+ * 
+ * 	PostFilter --> Works on response 
+ * 
+ * 	RouteFilter --> Works on service instance object
+ * 
+ * 	ExceptionFilter --> Works only if exception is rased   
+ * 
+ * 
+ * **/
+
+@Component
+public class ExceptionFilter extends ZuulFilter{
+
+	// to enable and disable filter
+	public boolean shouldFilter() {
+		return true;
+	}
+
+	
+	// to provide work or loginc for filter ,
+	public Object run() throws ZuulException {
+		System.out.println("From Exception Filter");
+		return null;
+	}
+
+	
+	// specify which filter it is
+	public String filterType() {
+		return FilterConstants.ERROR_TYPE;
+		// return "error";  					/// also can be  defined as 
+	}
+
+	
+	
+	// specifies execution order if multiple filter of same type are running
+	public int filterOrder() {
+		return 0;
+	}
+
+}

Microservices/SpringCloudZuul/SpringCloud_ZuulGateway-ZuulServer/src/main/java/com/app/filters/PostFilter.java

@@ -0,0 +1,58 @@
+package com.app.filters;
+
+import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants;
+import org.springframework.stereotype.Component;
+
+import com.netflix.zuul.ZuulFilter;
+import com.netflix.zuul.exception.ZuulException;
+
+/**
+ *  Filters are used in zuul server to pre process and post process request and response . 
+ *  There are 4 types of filters .
+ *  
+ *  	MyFilter ----> ZuulFilter (AC) ---> IZuulFilter (I)
+ *  
+ *  
+ *  PreFilter , PostFilter , RouteFilter , ExceptionFilter 
+ * 
+ * 	PreFilter --> Works on request 
+ * 
+ * 	PostFilter --> Works on response 
+ * 
+ * 	RouteFilter --> Works on service instance object
+ * 
+ * 	ExceptionFilter --> Works only if exception is rased   
+ * 
+ * 
+ * **/
+
+@Component
+public class PostFilter extends ZuulFilter{
+
+	// to enable and disable filter
+	public boolean shouldFilter() {
+		return true;
+	}
+
+	
+	// to provide work or loginc for filter , for postfilter - data conversion , encodeing ,decoding etc .
+	public Object run() throws ZuulException {
+		System.out.println("From Post Filter");
+		return null;
+	}
+
+	
+	// specify which filter it is
+	public String filterType() {
+		return FilterConstants.POST_TYPE;
+		// return "post";  					/// also can be  defined as 
+	}
+
+	
+	
+	// specifies execution order if multiple filter of same type are running
+	public int filterOrder() {
+		return 0;
+	}
+
+}

Microservices/SpringCloudZuul/SpringCloud_ZuulGateway-ZuulServer/src/main/java/com/app/filters/PreFilter.java

@@ -0,0 +1,58 @@
+package com.app.filters;
+
+import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants;
+import org.springframework.stereotype.Component;
+
+import com.netflix.zuul.ZuulFilter;
+import com.netflix.zuul.exception.ZuulException;
+
+/**
+ *  Filters are used in zuul server to pre process and post process request and response . 
+ *  There are 4 types of filters .
+ *  
+ *  	MyFilter ----> ZuulFilter (AC) ---> IZuulFilter (I)
+ *  
+ *  
+ *  PreFilter , PostFilter , RouteFilter , ExceptionFilter 
+ * 
+ * 	PreFilter --> Works on request 
+ * 
+ * 	PostFilter --> Works on response 
+ * 
+ * 	RouteFilter --> Works on service instance object
+ * 
+ * 	ExceptionFilter --> Works only if exception is rased   
+ * 
+ * 
+ * **/
+
+@Component
+public class PreFilter extends ZuulFilter{
+
+	// to enable and disable filter
+	public boolean shouldFilter() {
+		return true;
+	}
+
+	
+	// to provide work or loginc for filter , for prefilter - validate headers , encodeing ,decoding etc .
+	public Object run() throws ZuulException {
+		System.out.println("From Pre Filter");
+		return null;
+	}
+
+	
+	// specify which filter it is
+	public String filterType() {
+		return FilterConstants.PRE_TYPE;
+		// return "pre";  					/// also can be  defined as 
+	}
+
+	
+	
+	// specifies execution order if multiple filter of same type are running
+	public int filterOrder() {
+		return 0;
+	}
+
+}

Microservices/SpringCloudZuul/SpringCloud_ZuulGateway-ZuulServer/src/main/java/com/app/filters/RouteFilter.java

@@ -0,0 +1,58 @@
+package com.app.filters;
+
+import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants;
+import org.springframework.stereotype.Component;
+
+import com.netflix.zuul.ZuulFilter;
+import com.netflix.zuul.exception.ZuulException;
+
+/**
+ *  Filters are used in zuul server to pre process and post process request and response . 
+ *  There are 4 types of filters .
+ *  
+ *  	MyFilter ----> ZuulFilter (AC) ---> IZuulFilter (I)
+ *  
+ *  
+ *  PreFilter , PostFilter , RouteFilter , ExceptionFilter 
+ * 
+ * 	PreFilter --> Works on request 
+ * 
+ * 	PostFilter --> Works on response 
+ * 
+ * 	RouteFilter --> Works on service instance object
+ * 
+ * 	ExceptionFilter --> Works only if exception is rased   
+ * 
+ * 
+ * **/
+
+@Component
+public class RouteFilter extends ZuulFilter{
+
+	// to enable and disable filter
+	public boolean shouldFilter() {
+		return true;
+	}
+
+	
+	// to provide work or loginc for filter , f
+	public Object run() throws ZuulException {
+		System.out.println("From Route Filter");
+		return null;
+	}
+
+	
+	// specify which filter it is
+	public String filterType() {
+		return FilterConstants.ROUTE_TYPE;
+		// return "route";  					/// also can be  defined as 
+	}
+
+	
+	
+	// specifies execution order if multiple filter of same type are running
+	public int filterOrder() {
+		return 0;
+	}
+
+}

Microservices/SpringCloudZuul/SpringCloud_ZuulGateway-ZuulServer/target/classes/META-INF/maven/com.app/SpringCloud_ZuulGateway-ZuulServer/pom.properties

@@ -1,5 +1,5 @@
 #Generated by Maven Integration for Eclipse
-#Thu Aug 15 11:23:40 IST 2019
+#Fri Aug 16 15:05:17 IST 2019
 version=1.0
 groupId=com.app
 m2e.projectName=SpringCloud_ZuulGateway-ZuulServer