菲利克斯列出OSGI包處於活動狀態，但勾勾Shell命令不可訪問（依賴關係）

Question

此基礎代碼是否能夠成功在使命令scopeA：在shell訪問的測試：

package com.A; 

import org.apache.felix.ipojo.annotations.Component; 
import org.apache.felix.ipojo.annotations.Instantiate; 
import org.apache.felix.ipojo.annotations.Provides; 
import org.apache.felix.ipojo.annotations.Requires; 
import org.apache.felix.ipojo.annotations.ServiceProperty; 
import org.apache.felix.service.command.Descriptor; 

@Component(immediate = true) 
@Instantiate 
@Provides(specifications = Commands.class) 
public final class Commands { 

    @ServiceProperty(name = "osgi.command.scope", value = "scopeA") 
    String scope; 

    @ServiceProperty(name = "osgi.command.function", value = "{}") 
    String[] function = new String[] { 
      "test" 
    }; 

    @Descriptor("Example") 
    public void test() { 
     System.out.println("hello"); 
    } 
} 

但是，如果我添加一個構造函數，依賴於另一個OSGI組件，它不再可訪問命令，「幫助」不會列出它。然而，該包仍然可以加載到活動狀態。

package com.A; 

import org.apache.felix.ipojo.annotations.Component; 
import org.apache.felix.ipojo.annotations.Instantiate; 
import org.apache.felix.ipojo.annotations.Provides; 
import org.apache.felix.ipojo.annotations.Requires; 
import org.apache.felix.ipojo.annotations.ServiceProperty; 
import org.apache.felix.service.command.Descriptor; 

import com.B; 

@Component(immediate = true) 
@Instantiate 
@Provides(specifications = Commands.class) 
public final class Commands { 

    public Commands(@Requires B b) { 
    } 

    @ServiceProperty(name = "osgi.command.scope", value = "scopeA") 
    String scope; 

    @ServiceProperty(name = "osgi.command.function", value = "{}") 
    String[] function = new String[] { 
      "test" 
    }; 

    @Descriptor("Example") 
    public void test() { 
     System.out.println("hello"); 
    } 
} 

B的內容很簡單：

import org.apache.felix.ipojo.annotations.Component; 
import org.apache.felix.ipojo.annotations.Instantiate; 
import org.apache.felix.ipojo.annotations.Provides; 

@Component(immediate = true) 
@Instantiate 
@Provides 
final class B { 
} 

爲什麼命令不再列出任何想法？提示找到有關狀態的更多信息，以便我可以更好地調試此問題？

Answer 1

問題是，命令需要@Requires在一個字段而不是在構造函數中。

@Requires 
B b; 

構造函數也必須刪除。

這是因爲gogo有調用組件的特殊方法。